That was your 1st jam ?! Congratulation ! That's a good game, and even more for a first jam. You can be proud of what you have done.
I suggest you not making games too hard for a jam. Players have many different skills, we are not all interested by the same kind of game, but as game maker, we are open to all kind. If your game is too hard, the most of what you've done will be seen by only few people: It's a pity!