Great game!! Only negatives are that I found the missions a bit short, turning the Sound off creates random stutters which were annoying (I only muted it because I got the Headphone Head so I muted the game and had my own music playing in the background), Survival Mode is broken in the time between Waves e.g. I would only get half way through one Wave and the next one started and some times I absolutely zoomed through a Wave and spent around 20 seconds just sitting there waiting for the next one to start, and using a cheap tactic with Double Jump and K, I couldn't take any damage, then I unlocked Concussion Mode and I absolutely decimated everything. All in all, I over looked these things quickly and had a ton of fun!! I would easily pay money to play this game, keep up the great work!!