diff --git a/Cargo.lock b/Cargo.lock
index 0059edf..957e1a0 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -238,9 +238,9 @@ checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
 [[package]]
 name = "chumsky"
-version = "0.5.0"
+version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c2d3efff85e8572b1c3fa0127706af58c4fff8458f8d9436d54b1e97573c7a3f"
+checksum = "8d02796e4586c6c41aeb68eae9bfb4558a522c35f1430c14b40136c3706e09e4"
 dependencies = [
  "ahash",
 ]
@@ -498,14 +498,14 @@ checksum = "b365fabc795046672053e29c954733ec3b05e4be654ab130fe8f1f94d7051f35"
 [[package]]
 name = "curlywas"
 version = "0.1.0"
-source = "git+https://github.com/exoticorn/curlywas.git?rev=196719b#196719b35ef377cb7e001554b27ac5de013dcf2b"
+source = "git+https://github.com/exoticorn/curlywas.git?rev=cda3eb868bc1aaa837c4d36898d0e885ee8fce59#cda3eb868bc1aaa837c4d36898d0e885ee8fce59"
 dependencies = [
  "anyhow",
  "ariadne",
  "chumsky",
  "pico-args",
- "wasm-encoder",
- "wasmparser 0.81.0",
+ "wasm-encoder 0.10.0",
+ "wasmparser 0.83.0",
 ]
 
 [[package]]
@@ -2338,7 +2338,7 @@ dependencies = [
  "pico-args",
  "upkr",
  "walrus",
- "wasm-encoder",
+ "wasm-encoder 0.8.0",
  "wasmparser 0.81.0",
 ]
 
@@ -2506,6 +2506,15 @@ dependencies = [
  "leb128",
 ]
 
+[[package]]
+name = "wasm-encoder"
+version = "0.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "aa9d9bf45fc46f71c407837c9b30b1e874197f2dc357588430b21e5017d290ab"
+dependencies = [
+ "leb128",
+]
+
 [[package]]
 name = "wasmparser"
 version = "0.77.0"
@@ -2524,6 +2533,12 @@ version = "0.81.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "98930446519f63d00a836efdc22f67766ceae8dbcc1571379f2bcabc6b2b9abc"
 
+[[package]]
+name = "wasmparser"
+version = "0.83.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "718ed7c55c2add6548cca3ddd6383d738cd73b892df400e96b9aa876f0141d7a"
+
 [[package]]
 name = "wasmtime"
 version = "0.30.0"
diff --git a/Cargo.toml b/Cargo.toml
index 4195385..df4789c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -16,7 +16,7 @@ anyhow = "1"
 minifb = { version = "0.20", default-features = false, features = ["x11"] }
 notify = "4"
 pico-args = "0.4"
-curlywas = { git = "https://github.com/exoticorn/curlywas.git", rev = "196719b" }
+curlywas = { git = "https://github.com/exoticorn/curlywas.git", rev = "cda3eb868bc1aaa837c4d36898d0e885ee8fce59" }
 wat = "1"
 uw8-tool = { path = "uw8-tool" }
 same-file = "1"
diff --git a/examples/curlywas/control.cwa b/examples/curlywas/control.cwa
index e9202b5..50afdf8 100644
--- a/examples/curlywas/control.cwa
+++ b/examples/curlywas/control.cwa
@@ -1,5 +1,4 @@
-import "env.memory" memory(4);
-import "env.printString" fn printString(i32);
+include "microw8-api.cwa"
 
 export fn upd() {
   printString(0x20000);
diff --git a/examples/curlywas/fireworks.cwa b/examples/curlywas/fireworks.cwa
index 3976171..7d008ca 100644
--- a/examples/curlywas/fireworks.cwa
+++ b/examples/curlywas/fireworks.cwa
@@ -1,11 +1,4 @@
-import "env.time" fn time() -> f32;
-import "env.circle" fn circle(f32, f32, f32, i32);
-import "env.cls" fn cls(i32);
-import "env.randomSeed" fn seed(i32);
-import "env.randomf" fn randomf() -> f32;
-import "env.sin" fn sin(f32) -> f32;
-import "env.cos" fn cos(f32) -> f32;
-import "env.fmod" fn fmod(f32, f32) -> f32;
+include "microw8-api.cwa"
 
 export fn upd() {
     cls(0);
@@ -15,10 +8,10 @@ export fn upd() {
         let inline rocket = i #>> 9;
         let lazy local_time = fmod(time() + rocket as f32 / 5 as f32, 2 as f32);
         let lazy rocket = rocket + nearest(time() - local_time) as i32 * 10;
-        seed(rocket);
+        randomSeed(rocket);
         let inline x = randomf() * 645 as f32;
         let y = randomf() * 133 as f32;
-        let lazy angle = { seed(i); randomf() } * 44 as f32;
+        let lazy angle = { randomSeed(i); randomf() } * 44 as f32;
         let inline dx = sin(angle);
         let inline dy = cos(angle);
         let lazy dist = local_time * (randomf() * 44 as f32);
diff --git a/examples/curlywas/font_palette.cwa b/examples/curlywas/font_palette.cwa
index 7cb199a..67dc94e 100644
--- a/examples/curlywas/font_palette.cwa
+++ b/examples/curlywas/font_palette.cwa
@@ -1,38 +1,30 @@
-import "env.memory" memory(4);
-
-import "env.cls" fn cls(i32);
-import "env.printString" fn printString(i32);
-import "env.printChar" fn printChar(i32);
-import "env.setCursorPosition" fn setCursor(i32, i32);
-import "env.setTextColor" fn setTextColor(i32);
-import "env.line" fn line(f32, f32, f32, f32, i32);
-import "env.isButtonTriggered" fn triggered(i32) -> i32;
+include "microw8-api.cwa"
 
 global mut mode: i32 = 0;
 
 export fn upd() {
     cls(0);
 
-    if triggered(4) {
+    if isButtonTriggered(BUTTON_A) {
         mode = !mode;
     }
 
     setTextColor(15);
-    printString(mode * 0x20000);
+    printString(mode * USER_MEM);
 
     let y: i32;
     loop y {
         line(0 as f32, (y * 9 + 39) as f32, (14+16*9) as f32, (y * 9 + 39) as f32, 1);
         line((y * 9 + 15) as f32, 24 as f32, (y * 9 + 15) as f32, (38+16*9) as f32, 1);
         setTextColor(15);
-        setCursor(y * 9 + 16, 24);
+        setCursorPosition(y * 9 + 16, 24);
         let lazy hexChar = select(y < 10, y + 48, y + 87);
         printChar(hexChar);
-        setCursor(0, y * 9 + 24+16);
+        setCursorPosition(0, y * 9 + 24+16);
         printChar(hexChar);
         let x = 0;
         loop x {
-            setCursor(x * 9 + 16, y * 9 + 24+16);
+            setCursorPosition(x * 9 + 16, y * 9 + 24+16);
             setTextColor(select(mode, x + y * 16, -9));
             if y >= 2 | mode {
                 printChar(select(mode, 0xa4, x + y * 16));
@@ -47,6 +39,6 @@ data 0 {
     "Default font:      (press " i8(0xcc) " for palette)" i8(5, 0)
 }
 
-data 0x20000 {
+data USER_MEM {
     "Default palette:   (press " i8(0xcc) " for font)" i8(5, 0)
 }
\ No newline at end of file
diff --git a/examples/curlywas/line.cwa b/examples/curlywas/line.cwa
index e1240d6..2a80bdf 100644
--- a/examples/curlywas/line.cwa
+++ b/examples/curlywas/line.cwa
@@ -1,10 +1,4 @@
-import "env.memory" memory(4);
-
-import "env.cls" fn cls(i32);
-import "env.time" fn time() -> f32;
-import "env.line" fn line(f32, f32, f32, f32, i32);
-import "env.sin" fn sin(f32) -> f32;
-import "env.cos" fn cos(f32) -> f32;
+include "microw8-api.cwa"
 
 export fn upd() {
     cls(0);
diff --git a/examples/curlywas/microw8-api.cwa b/examples/curlywas/microw8-api.cwa
new file mode 100644
index 0000000..5d50279
--- /dev/null
+++ b/examples/curlywas/microw8-api.cwa
@@ -0,0 +1,50 @@
+// MicroW8 APIs, to be `include`d in CurlyWas sources
+import "env.memory" memory(4);
+
+import "env.sin" fn sin(f32) -> f32;
+import "env.cos" fn cos(f32) -> f32;
+import "env.tan" fn tan(f32) -> f32;
+import "env.asin" fn asin(f32) -> f32;
+import "env.acos" fn acos(f32) -> f32;
+import "env.atan" fn atan(f32) -> f32;
+import "env.atan2" fn atan2(f32, f32) -> f32;
+import "env.pow" fn pow(f32, f32) -> f32;
+import "env.log" fn log(f32) -> f32;
+import "env.fmod" fn fmod(f32, f32) -> f32;
+import "env.random" fn random() -> i32;
+import "env.randomf" fn randomf() -> f32;
+import "env.randomSeed" fn randomSeed(i32);
+import "env.cls" fn cls(i32);
+import "env.setPixel" fn setPixel(i32, i32, i32);
+import "env.getPixel" fn getPixel(i32, i32) -> i32;
+import "env.hline" fn hline(i32, i32, i32, i32);
+import "env.rectangle" fn rectangle(f32, f32, f32, f32, i32);
+import "env.circle" fn circle(f32, f32, f32, i32);
+import "env.line" fn line(f32, f32, f32, f32, i32);
+import "env.time" fn time() -> f32;
+import "env.isButtonPressed" fn isButtonPressed(i32) -> i32;
+import "env.isButtonTriggered" fn isButtonTriggered(i32) -> i32;
+import "env.printChar" fn printChar(i32);
+import "env.printString" fn printString(i32);
+import "env.printInt" fn printInt(i32);
+import "env.setTextColor" fn setTextColor(i32);
+import "env.setBackgroundColor" fn setBackgroundColor(i32);
+import "env.setCursorPosition" fn setCursorPosition(i32, i32);
+import "env.rectangle_outline" fn rectangle_outline(f32, f32, f32, f32, i32);
+import "env.circle_outline" fn circle_outline(f32, f32, f32, i32);
+import "env.exp" fn exp(f32) -> f32;
+
+const TIME_MS = 0x40;
+const GAMEPAD = 0x44;
+const FRAMEBUFFER = 0x78;
+const PALETTE = 0x13000;
+const FONT = 0x13400;
+const USER_MEM = 0x14000;
+const BUTTON_UP = 0x0;
+const BUTTON_DOWN = 0x1;
+const BUTTON_LEFT = 0x2;
+const BUTTON_RIGHT = 0x3;
+const BUTTON_A = 0x4;
+const BUTTON_B = 0x5;
+const BUTTON_X = 0x6;
+const BUTTON_Y = 0x7;
diff --git a/examples/curlywas/skipahead.cwa b/examples/curlywas/skipahead.cwa
index 215f161..8241dec 100644
--- a/examples/curlywas/skipahead.cwa
+++ b/examples/curlywas/skipahead.cwa
@@ -1,12 +1,4 @@
-import "env.memory" memory(4);
-
-import "env.rectangle" fn rect(f32, f32, f32, f32, i32);
-import "env.circle" fn circle(f32, f32, f32, i32);
-import "env.isButtonPressed" fn btn(i32) -> i32;
-import "env.random" fn random() -> i32;
-import "env.randomSeed" fn randomSeed(i32);
-import "env.cls" fn cls(i32);
-import "env.printInt" fn printInt(i32);
+include "microw8-api.cwa"
 
 global mut pz: i32 = 4;
 global mut px: f32 = 2.0;
@@ -19,7 +11,7 @@ export fn upd() {
     let inline zero = 0.0;
 
     let lazy control_speed = 0.03125;
-    s = s + 0.1875 - (f + control_speed) * btn(4 <| cls(4)) as f32;
+    s = s + 0.1875 - (f + control_speed) * isButtonPressed(4 <| cls(4)) as f32;
     f = f * 0.5625;
 
     printInt(pz);
@@ -33,8 +25,8 @@ export fn upd() {
         
         let inline c = (z & 1) * -2;
         let inline yf = y as f32;
-        rect(rx, yf, rw, yf / 6 as f32, c + 1);
-        rect(rx, yf, rw, 1 as f32, c - 4);
+        rectangle(rx, yf, rw, yf / 6 as f32, c + 1);
+        rectangle(rx, yf, rw, 1 as f32, c - 4);
 
         if y == 180 & py > zero {
             if x > w | x < zero {
@@ -51,7 +43,7 @@ export fn upd() {
     circle(160 as f32, 160 as f32 + py, 22 as f32, -28);
     circle((160 - 6) as f32, (160 - 6) as f32 + py, 6 as f32, -26);
 
-    px = px + (btn(3) - btn(2)) as f32 * control_speed;
+    px = px + (isButtonPressed(3) - isButtonPressed(2)) as f32 * control_speed;
     py = py + s;
     pz = pz + 1;
 }
diff --git a/examples/curlywas/technotunnel.cwa b/examples/curlywas/technotunnel.cwa
index 785b373..f391aa9 100644
--- a/examples/curlywas/technotunnel.cwa
+++ b/examples/curlywas/technotunnel.cwa
@@ -1,7 +1,4 @@
-import "env.memory" memory(4);
-import "env.sin" fn sin(f32) -> f32;
-import "env.time" fn time() -> f32;
-import "env.setPixel" fn setPixel(i32, i32, i32);
+include "microw8-api.cwa"
 
 export fn upd() {
     let x: i32;
diff --git a/examples/curlywas/trainride.cwa b/examples/curlywas/trainride.cwa
index f0bf567..db1ea0b 100644
--- a/examples/curlywas/trainride.cwa
+++ b/examples/curlywas/trainride.cwa
@@ -1,7 +1,4 @@
-import "env.memory" memory(2);
-
-import "env.fmod" fn fmod(f32, f32) -> f32;
-import "env.time" fn time() -> f32;
+include "microw8-api.cwa"
 
 export fn upd() {
   let i: i32;
diff --git a/examples/curlywas/tunnel.cwa b/examples/curlywas/tunnel.cwa
index 33a85aa..e25a4b0 100644
--- a/examples/curlywas/tunnel.cwa
+++ b/examples/curlywas/tunnel.cwa
@@ -1,7 +1,4 @@
-import "env.memory" memory(4);
-
-import "env.atan2" fn atan2(f32, f32) -> f32;
-import "env.time" fn time() -> f32;
+include "microw8-api.cwa"
 
 export fn upd() {
     let i: i32;
diff --git a/src/main.rs b/src/main.rs
index 3a6e185..b4f86a7 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -135,17 +135,15 @@ struct Config {
 }
 
 fn load_cart(filename: &Path, config: &Config) -> Result<Vec<u8>> {
-    let mut cart = vec![];
-    File::open(filename)?.read_to_end(&mut cart)?;
-
-    if cart[0] >= 10 {
-        let src = String::from_utf8(cart)?;
-        cart = if src.chars().find(|c| !c.is_whitespace()) == Some('(') {
-            wat::parse_str(src)?
-        } else {
-            curlywas::compile_str(&src, filename, curlywas::Options::default())?
-        };
-    }
+    let mut cart = match SourceType::of_file(filename)? {
+        SourceType::Binary => {
+            let mut cart = vec![];
+            File::open(filename)?.read_to_end(&mut cart)?;
+            cart
+        }
+        SourceType::Wat => wat::parse_file(filename)?,
+        SourceType::CurlyWas => curlywas::compile_file(filename, curlywas::Options::default())?,
+    };
 
     if let Some(ref pack_config) = config.pack {
         cart = uw8_tool::pack(&cart, pack_config)?;
@@ -159,6 +157,41 @@ fn load_cart(filename: &Path, config: &Config) -> Result<Vec<u8>> {
     Ok(cart)
 }
 
+enum SourceType {
+    Binary,
+    Wat,
+    CurlyWas,
+}
+
+impl SourceType {
+    fn of_file(filename: &Path) -> Result<SourceType> {
+        if let Some(extension) = filename.extension() {
+            if extension == "uw8" || extension == "wasm" {
+                return Ok(SourceType::Binary);
+            } else if extension == "wat" || extension == "wast" {
+                return Ok(SourceType::Wat);
+            } else if extension == "cwa" {
+                return Ok(SourceType::CurlyWas);
+            }
+        }
+
+        let mut cart = vec![];
+        File::open(filename)?.read_to_end(&mut cart)?;
+
+        let ty = if cart[0] < 10 {
+            SourceType::Binary
+        } else {
+            let src = String::from_utf8(cart)?;
+            if src.chars().find(|&c| !c.is_whitespace() && c != ';') == Some('(') {
+                SourceType::Wat
+            } else {
+                SourceType::CurlyWas
+            }
+        };
+        Ok(ty)
+    }
+}
+
 #[cfg(any(feature = "native", feature = "browser"))]
 fn start_cart(filename: &Path, runtime: &mut dyn Runtime, config: &Config) -> Result<()> {
     let cart = load_cart(filename, config)?;
diff --git a/uw8-tool/src/base_module.rs b/uw8-tool/src/base_module.rs
index c8ac048..c9c042f 100644
--- a/uw8-tool/src/base_module.rs
+++ b/uw8-tool/src/base_module.rs
@@ -291,7 +291,7 @@ impl BaseModule {
 
     pub fn write_as_cwa<P: AsRef<Path>>(&self, path: P) -> Result<()> {
         fn inner(mut file: File, base: &BaseModule) -> Result<()> {
-            writeln!(file, ";; MicroW8 APIs, to be `include`d in CurlyWas sources")?;
+            writeln!(file, "// MicroW8 APIs, to be `include`d in CurlyWas sources")?;
             writeln!(file, "import \"env.memory\" memory({});", base.memory)?;
             writeln!(file)?;
             for &(module, ref name, type_id) in &base.function_imports {