This game is really cool!
I love the art and design but the only thing that is holding me back on giving you 4 stars is that the aiming is not very good because you can only shoot up, down, left, and right

Pros:
-Simple enough to play
Cons:
-Enemies can approach from above and below, however player can only shoot left and right
-no melee weapon so when out of ammo unable to fight

Summary:
If you are new to programming and game development fair enough as practice.
But not really something I can invest any time into