Great job on this, congrats on making your first jam game, you should be proud! The timer was a bit short for me, I didn't manage to get very far. For game jams, I always try to keep the difficulty pretty easy - people are playing lots of entries and that way they'll see more of your game. You can always ramp up difficulty in later levels.
Anyway, I hope you enjoyed your first jam and looking forward to seeing more cool games from you in the future!