Machine Wars

Nice graphics. The hero is cute and the robots are pretty cool looking. The controls feel good and movement is smooth. However, this could use more story and a sense of progress.

The ends of the "levels" need something more than just being able to walk out the side of the screen as a transition. A splash scene to segue to the next (floor of the factory/area of robot HQ/whatever) level would give your players a sense of having accomplished something and tell them where they are in your game.

I'd also like to see the robots break when they're shot - just disappearing is disappointing - I want to see them as a pile of parts after I end them!

Last suggestion: each level should be a bit different than the last - different robots, robots coming in from different directions, more robots attacking at once, some obstacles to jump over/get around, whatever.