I kinda liked it. The visuals were appealing, the gameplay was tight, in some way challenging, had a well planed upgrading system and a fair difficulty curve.
...However...
What kept me from giving this game a solid 4.5/5 was the poor optimisation. I found myself being killed due to performance issues one too many times. A game can be as good as it wants: If it fails at optimization and thus has a bad performance, it, unfortunately, affects the entire project negatively. That is sad, because otherwise, this game is realy GOOD.
I hope that you will fix this in your next projects, because you have realy shown some promise with this one.