These are exactly my thoughts as well: I made a cool game, but I didn't have a good way to present the game with player feedback and scoring. I do have a sound for enemies attacking. I made it relatively quiet though because it might get annoying. I was also thinking about adding the variable jump, but as you said I was being pretty ambitious working on the other systems. Will definitely try to focus it in a smaller mechanic for the next jams. Your feedback means a lot, thank you!