PROS:
+ Shooting mechanics has lots of potential
+ Cool looking sprites
+ Impressive that this was made in under 4 hours
CONS:
- A bit buggy :(
For some reason, when I moved the character past my cursor, the gun flipped and I was shooting backwards.
I do not know if this was a bug or not, but I think you can utilize this by making this a physics-based gameplay mechanic, where you could shoot those Eye Monsters using bullets that bounce of tiles and platforms.
This game has potential; just requires some polish and you'll have a great game! :)