We made a tiny topdown puzzle platformer game this week for the GMTK game jam: https://colinbellino.itch.io/towisiatl
Of course, we used no third party engine, only handmade code (in Jai) and pixels ❤️

I made a mini 2D first person dungeon crawler in a week for the 7DFPS game jam (with a team of two for art/audio).
Pretty happy that i can now make small games in a few days entirely with my own tools instead of a third party engine, and overall the game turned out alright i think. (the game code is about 3k lines of jai in a single file :grug: )
https://colinbellino.itch.io/monstrum-prison