Terra - A Terraria Demake is a combination of insane optimisations, clever workarounds and tradeoffs, designed to fit as much content from Terraria into a single PICO-8 cart as possible, while putting its own spin on certain things to make gameplay flow better!
You can find out more and play it on its itch.io
pages, or play it here in this embed!
Whichever way you decide to play, I recommend having the Terra Wiki
open in another tab! It'll help if you get stuck :)