Nothing good but nothing bad either
In my own opinion, I think the effort you put into this game really payed off. The missions elect screen, the music, the cutscenes, even the intro gave me the impression that this was a well put together game. And it is, the graphics, I think, are what you aimed for, not to be too flashy or too stand out but your own personal style.
The reason this isn't a ten is because when I played, I felt like I've played a game like this before. There isn't right much to the gameplay at all. Simple sidescroller. There wasn't really much too it. I hate to be this harsh considering you spent two years on this but there isn't very much which makes it standout. I'd at least implement a customisation feature as, come on, it's robots. Also, more attacks and more unique enemies.
All in all, this game is well put togeher but the gameplay isn't anything we haven't seen before.