its quite fun, but definitely there is room for improvement:
1. faster bullets and movement.... everything in this game feels quite slow, and imo if you increase the speed of the bullets and decrese the firetime, and decrease the damage accordingly, itll at least feel much better.
2. fired bullets should NOT despawn after travelling half the room. Considering how slow the bullets are, missing a shot because it despawned before it hit the enemy feels extremely lame :(
3. Enemies that are more interesting to fight. For example, how cool would it be if those square that move and split into smaller ones constantly followed you, but fairly slowly, and then once split, the 2 mini ones zoom towards you! They should be quick to dispatch, how many bullets they take dependant on how many bullets you can fire (if the bullets are too slow theyll catch up to you)
Just a few of my ideas, I am excited to see where this game goes from here :)