Even though you didn't have a lot of time to work on this, I think it came out very well!
I think having a bit more control over the jump might make things feel nicer, especially because some of these jumps require precise timing and aim. For example, I could jump higher the longer I held space, it could make aiming my jumps more fun and rewarding. It could also add additional layers of strategy to this game if that's something you want to go for.
Nonetheless, I still think this game is very solid, and I enjoyed playing it a lot!