itch.io

I hate the idea. I love TIC-80 for its simplicity. It is easy to pick up and actually make some funny stuff in that can be shared with others. 

As for your suggestion, I think there's already a project like you have described it is called 8bitworkshop:

http://8bitworkshop.com

Also you'll probably like Zachtronics's stuff like TIS-100 or Shenzhen IO: 

http://www.zachtronics.com/shenzhen-io/

http://www.zachtronics.com/tis-100/