diff --git a/build/plugins/wasmPlugin.ts b/build/plugins/wasmPlugin.ts
index b698cdd..c9ca265 100644
--- a/build/plugins/wasmPlugin.ts
+++ b/build/plugins/wasmPlugin.ts
@@ -16,7 +16,7 @@ const wasiArchiveURL = 'https://github.com/WebAssembly/wasi-sdk/releases/downloa
 const rtURL = 'https://github.com/WebAssembly/wasi-sdk/releases/download/wasi-sdk-25/libclang_rt.builtins-wasm32-wasi-25.0.tar.gz';
 
 const getCompiler = async (): Promise<CompilerWithFlags> => {
-    const wasiDir = path.resolve(import.meta.dir, '..', 'dist', 'wasi');
+    const wasiDir = path.resolve(import.meta.dir, '..', '..', 'dist', 'wasi');
     const cc: CompilerWithFlags = {
         cc: 'clang',
         flags: [
@@ -113,17 +113,12 @@ async function instantiate(url: string) {
     let errBuf = '';
     const { instance } = await WebAssembly.instantiateStreaming(fetch(url), {
         env: { memory, __indirect_function_table: table },
-        wasi_snapshot_preview1: {
+        wasi_snapshot_preview1: new Proxy({
             random_get: (ptr: number, length: number) => {
                 for (let i = 0; i < length; i++) {
                     data.setUint8(ptr + i, Math.random() * 256);
                 }
             },
-            environ_sizes_get: (...args: any[]) => { console.debug(`[environ_sizes_get]`, args); return 0; },
-            environ_get: (...args: any[]) => { console.debug(`[environ_get]`, args); return 0; },
-            proc_exit: (...args: any[]) => { console.debug(`[proc_exit]`, args); return 0; },
-            fd_close: (...args: any[]) => { console.debug(`[fd_close]`, args); return 0; },
-            fd_seek: (...args: any[]) => { console.debug(`[fd_seek]`, args); return 0; },
             fd_write: (fd: number, iovsPtr: number, iovsLength: number, bytesWrittenPtr: number) => {
                 const iovs = new Uint32Array(memory.buffer, iovsPtr, iovsLength * 2);
                 if (fd === 1 || fd === 2) {
@@ -149,11 +144,15 @@ async function instantiate(url: string) {
                 }
                 return 0;
             },
-            fd_read: (...args: any[]) => { console.debug(`[fd_read]`, args); return 0; },
-            fd_fdstat_get: (fd: number, fdstatPtr: number) => { console.debug(`[fd_fdstat_get] fd=${fd}, ptr=${fdstatPtr}`); return 0; },
-            fd_prestat_get: (...args: any[]) => { console.debug(`[fd_prestat_get]`, args); return 0; },
-            fd_prestat_dir_name: (...args: any[]) => { console.debug(`[fd_prestat_dir_name]`, args); return 0; },
-        }
+        }, {
+            get(target, p) {
+                if (p in target) {
+                    console.debug(`[${String(p)}] exists`);
+                    return target[p as keyof typeof target];
+                }
+                return (...args: any[]) => { console.debug(`[${String(p)}]`, args); return 0; }
+            },
+        }),
     });
 
     return {
@@ -169,7 +168,7 @@ const wasmPlugin = ({ production }: WasmLoaderConfig = {}): BunPlugin => {
         name: "WASM loader",
         async setup(build) {
             build.onLoad({ filter: /\.(c(pp)?|wasm)$/ }, async (args) => {
-                let wasmPath = path.resolve(import.meta.dir, '..', 'dist', 'tmp.wasm');
+                let wasmPath = path.resolve(import.meta.dir, '..', '..', 'dist', 'tmp.wasm');
                 let jsContent: string = `
                     ${instantiate}
                     const module = await instantiate(new URL($WASM$));
@@ -179,7 +178,7 @@ const wasmPlugin = ({ production }: WasmLoaderConfig = {}): BunPlugin => {
                 if (args.path.endsWith('.wasm')) {
                     wasmPath = args.path;
                 } else {
-                    const buildAssets = path.resolve(import.meta.dir, 'assets');
+                    const buildAssets = path.resolve(import.meta.dir, '..', 'assets');
                     const include = `${buildAssets}/include`;
                     const glob = new Bun.Glob(`${buildAssets}/lib/**/*.c`);
                     const stdlib = await Array.fromAsync(glob.scan());
diff --git a/src/games/dropballs/index.ts b/src/games/dropballs/index.ts
index 591841d..2a907a3 100644
--- a/src/games/dropballs/index.ts
+++ b/src/games/dropballs/index.ts
@@ -1,5 +1,6 @@
 import { createCanvas } from "@common/display/canvas";
 import { gameLoop } from "@common/game";
+import { bresenhamCircleGen } from "@common/navigation/bresenham";
 import Physics from "@common/physics";
 import { mapNumber } from "@common/utils";
 
@@ -161,22 +162,8 @@ const frame = (dt: number, state: State) => {
 
 function fillCircle(ctx: CanvasRenderingContext2D, xc: number, yc: number, r: number) {
     // because default circle fill is antialiased
-    // https://stackoverflow.com/a/45745753
-    xc = xc | 0;
-    yc = yc | 0;
-    r = r | 0;
-    var x = r, y = 0, cd = 0;
-
-    // middle line
-    ctx.fillRect(xc - x, yc, r << 1, 1);
-
-    while (x > y) {
-        cd -= (--x) - (++y);
-        if (cd < 0) cd += x++;
-        ctx.fillRect(xc - y, yc - x, y << 1, 1);    // upper 1/4
-        ctx.fillRect(xc - x, yc - y, x << 1, 1);    // upper 2/4
-        ctx.fillRect(xc - x, yc + y, x << 1, 1);    // lower 3/4
-        ctx.fillRect(xc - y, yc + x, y << 1, 1);    // lower 4/4
+    for (const { x, y } of bresenhamCircleGen(xc, yc, r, { fill: true })) {
+        ctx.fillRect(x, y, 1, 1);
     }
 }