I like the top down perspective for the game it has a kind of arcady style to it.
The projectiles from the player character feels a bit too slow and under powered having them shoot faster and with more power would make shooting feel better.
The levels started to feel like the same after a while making a little variation will help people identify which levels are which.
the Quit button at the end of the game didn't actually quit the game when I pressed it.
Overall it was a good game!