This is really cool. I definitely think it could use more polish though. I would like to see a health bar for enemies and a way to remove weapons. I also wish there was a more clear end of level screen of some sort as it is kind of jarring to just instantly end up in the next level. Lastly, it always seemed like there was one planned way to use the weapons that was better than any other. It would have been cool if there were multiple viable weapon choices for each level and you could decide to use what you want and experiment. Regardless of any criticism, this is really impressive and fun to play. Great job!