Hey sweet game! This is like already production quality, I was really impressed.
Art - Really loved it. The colors all fit together well, and nothing seemed out of place. The weakest part may have been the enemies, which seemed a little too simple compared to how great the rest looked. But it was still consistent.
Gameplay - Mostly standard jumping type game, but I did like that if you waited to shoot and hit something you might propel yourself downwards. I was really quite confused by the coin system though. It seemed like I would often get coins following me and then if I shot something to keep going they would disappear? I did a full run towards the end where I got really high and got 0 coins, which was frustrating so I stopped playing.
I bet you'll rank quite high in the compo! Good luck!