This game was epic! Honestly did not expect a FPS game like this! Great dialogue and story building! I did get stuck on wave 4 and noticed ghosts on the top ledge, but after looking at the comments I realized I could launch myself up, so I'll definitely have to give that a try now! I did find it pretty easy since you could easily make a train of them, but hopefully it gets tougher in the later waves. I'd recommend for the ghosts to spawn even after killing them to make it more difficult on the player so that they have to be more aware of their surroundings. Also, they should definitely make noises so players can hear if they are behind them! Other than that, this is an amazing game!