This is a lot of fun! I appreciate the chunky gory sounds and splatters that make it feel extra punchy. The movement is fun and has some depth to it, like the pushback from gunfire that either slows down your momentum or helps you escape the horde backwards faster.
The game crashes on the 9th wave a few kills deep.
I also found a cheese spot on the stairs to the right of the starting area behind the barrels. The zombies are reluctant to come in if you go a little up the staircase and start to walk around the whole room to come in from behind, which makes it easy to train them and release if it gets overwhelming.
Overall, though, a lovely and clearly thought through gameplay experience. The chain reactions are satisfying and fun to play around with.