I'm having several issues with JavaScript, maybe all related to 1bpp sprites:

1. I draw 1bpp sprites that are supposed to have an opaque background, but are now transparent

2. font() sometimes doesn't work correctly in html exports

In-editor:

HTML export:

3. With the same HTML export, I have a crash at runtime with "memory access out of bounds".

Uncaught RuntimeError: memory access out of bounds
at tic80.wasm:0x8051
at tic80.wasm:0x2b2cba
at tic80.wasm:0xd8769
at tic80.wasm:0x1b26cc
at tic80.wasm:0x8926
at tic80.wasm:0x320d7
at tic80.wasm:0x64a0d
at tic80.wasm:0x29b47d
at tic80.wasm:0x2b6fe8
at tic80.wasm:0x2143f

I'm pretty sure those issues can be linked to QuickJS and 1bpp usage :/

Sorry I don't have much more details to give, due to the time it would take to update the code, export, and re-test. I also think TIC-80 would greatly benefit from an extensive suite of tests carts written in all supported languages.