No instructions. No indication that you're actually being hit. There lacks an overall goal for each stage to follow (timer, kill count, ect.). And the first stage is much to difficult. For some reason, when you lose all your life on the first level it takes you back to the start, but doing so any other level and it just takes you to the buy screen. If I wasn't reviewing the game, I would have quit first level. As it stands, the whole experience lead to nothing satisfying, and the idea of repeating levels is pretty much unnecessarily.