Hey!
nice game..
There are two main thing i would improve for the experience to be better..
Once is to improve the homescreen, the play button text honestly was pretty hard to read and the tutorial doesnt look good, kind of like drawn in paint..
The other thing I would improve is the aiming, you had a crosshair for aiming but the bullet actually didnt go there just where the gun was pointing, also when you kept trying to move the gun it changed hands and messed up the aiming once again
I liked how the enemy spawned kind of like growing from baby size to real size
anyways keep it up, the map was ok and the colors too
Alan