Fun64
Fun64 is a super simple super lowrez single file game engine powered by Gamecake, WebAssembly JS and Lua.
The FunPad lets you edit and run Fun64 code in any modern browser using Github Gist as storage, creating a unique url that you can share with others to play and collaborate on.
Beep is a simple frequency modulation synthesizer you can use to create sound effects (or questionable tunes) for your applications.