Played to a point where I had all upgrades. No idea if the game has an ending but at that point all waves felt so trivial anyway that I did not see a huge motivation to keep playing.
The best idea of this game is that you can swap between weapons that you acquire. It is almost like an old Quake where you swap between weapons to suit the current situation. Unfortunately, the difficulty of this game does not really do justice to this system - you can essentially complete the game with one weapon if you wish.
The game definitely has that Newgrounds vibe to it. Thanks for your entry!