Welcome to the site that encourages you
I've been messing around with Godot engine and as a byproduct of some experimentation ended up with a vaguely interesting spinning polygon (a rhombic triacontrahedron) with procedurally generating textures. (Yes, the use of present continual tense is intentional.) It will run in your browser (if it supports WebAssembly), though it's 17MB. Also the initial textures are white rather than an image on Android. (I've been told it doesn't work on iOS.)
Oh, you probably want the link. Here.