I have no idea how to code using regular coding programs, and I'm on a Chromebook. I don't think that I can download coding software on a Chromebook. By regular, I mean programs like javascript.

i used scratch in a few jams and i just made the project as download and made it so you can download my art and the link to the game is in the describtion

You could try to use Godot. It can be compiled to work on chromebook, or you can try web version if the editor. But if you’re stuck to Scratch 3, than you can make your project to .html (via phosphorus for example) and upload to itch.io page as normal.

So now I have a game, it works, but it's bad. it is 8-bit though!

my project deleted its self

You could use GDevelop5 its an easy to use and learn open source game engine that doesn't require coding experience and its what i use then collabing since its easy to learn to i just tell my team members to learn GDevelop during the jam! Also you can use it in your browser