I REALLY like this. Programming games are not only fun but also a great gateway. Very BOLD to make one as a jam games, big cojones friends.
My feedback is...
I really liked the sounds, very musically satisfying.
Being able to stop mid-code and apply a different code seems to break the logic of the game since you have to make it loop. Not a deal breaker, just a weird choice to not have the player restart at the start when you execute.
I think you didn't need the manual screen since you had the notes feature in game, plus the tutorial is really good. I wanted to consult the manual in game more than before playing actually.
Iconography is a little flaky. Portals have the same icon for in and out but only change color which may exclude colorblind audiences. Same goes for pressure plates. You can make icons different AND have different colors to have the best of both worlds :D