My thoughts of the game as I played:
Some indication of what the controls are at the beginning of the game would have been good. That said, it wasn't hard to figure out.
So, this is a shoot 'em up in which your shots get better and better as you get more and more candy. Cool.
I have played other games like this in other jams where the devs overestimated their players' skills. You definitely avoided that pitfall here, though around the time I had 1000 points it was too easy. I almost quit, thinking there wasn't anything more to the game, but then I saw the boss. In other words, the main gameplay is too long, but still fun.
The boss wasn't too hard to take down, either.
If you made the levels shorter you could ramp up the difficulty as the levels progress and have a really fun SHMUP.
I really liked this game. Good job, Wrath!