Fun gameplay, if a bit clunky at times. I love the soundtrack, it's just so metal. But like SplitHare, I also found that shooting was way too underpowered. Except for the suicide robots on wave 3, where I got annoyed that you need to dash beforehand. Would it be possible to split the two features into two separate buttons? I know that's part of the dual purpose design, but I feel that's handled well enough by the health-as-ammo mechanic.
Also, I feel that any game with mouse controls should have the left mouse button as the primary input, not the right.