Cool and very intuitive game. I expected manual reloading to be very annoying at first, but it actually felt quite refreshing compared to all other shooters. Having a shop is a neat idea. The art and sound effects are simple but work great together and create a nice and coherent whole.
I do however have 1 nitpick as I managed to soft lock my self on wave 5. I eliminated all hostiles leaving only me and a non-combatant alone in a room, and I since refuse to execute a non-combatant, and the doors won't open unless I do, so I'm pretty much stuck.