Great project, especially considering it's just an alpha version of the game—it's very fun to play with other players, and I hope the developers finish it. As it's an alpha, there are tons of bugs and errors; the most annoying is the FPS drops over time—for example, on wave 15, FPS falls to about 45-73. There are also sound issues, like the ray gun's sound lagging behind, and if you quickly shoot the shotgun into a zombie crowd, the sound builds up gradually (I almost went deaf); finally, there's desync between other players' animations and actions, and the achievement for getting the ray gun doesn't work. I wish good luck to the developer in completing the project!
Bolt Collective