TIC-80 is wonderful to play in. Besides being free/open, another advantage over PICO-8 is TIC-80 has native support for Fennel. i.e. you can code within the system editor in Lua OR Fennel (or half a dozen other languages!) You don't have to edit and transpile to Lua on the desktop as you would with PICO-8. This has some value in debugging with error messages and line numbers.

It's also just plain cool to rock the TIC-80 editor fullscreen with narrow font, coding natively in Lisp and publishing the result to a webpage you can share.

I wish the iOS (app) deployment story was a little smoother for TIC-80.