Its an okay Game,
but i started experiencing Issues when i spawned in about 10 Enemies (after pressing the New Wave Button 10x Times): by Issues i mean Lag. The Game starts chugging because of the Many Objects on screen and I think that should be Fixed.
The Concept is Basic and could be improved a bit, like for example by adding a Meter that tells the Player when the Arrow is ready to be Fired again. As the Game doesn't tell you.
The Enemies are Okay, the Pixel style could be explored a bit more but its Okay.
There could have been a small addition of Music next to the Sound Effects, as the Sound Effects are Fine.
Overall, its an Okay Game, but it can be Improved.
No Problem Dude, keep up what you Like.