Really fun game. I think the only nitpick I have is that for Game Jams it's usually better to do a web build if you can because it's easier for people to pick up and play. I am not sure how easy that is to do for GBA games though.
I did manage to get it to run on Linux using the mGBA Developmental App Image build.
It was a fun little game it took me quite a bit of tries to get the last jump, but I understood how to do it in theory because of the previous sections. Well done for a jam.