One of the best games I've played. The game seems simple and easy at first, but having to adjust to the different weapons really makes the game more challenging and interesting! It's really original, the game felt nicely polished with great graphics, and the game design/level design was really interesting, yet simple!
My only complaint is that I wanted more levels at the end xD
Really great job! You don't have to, but could you check out my game as well?