Pretty cool game I got up to wave 16 but I called it there with 8 turrets they weren't even coming out of spawn but I think with more refinement this is something pretty great on the lines of sanctum.
The plunger gun wasn't very good though except from at the starting rounds to get some extra cash for upgrades. I don't know if it was intentional but if you clump turrets together you can rewind multiple at the same time I managed to get 4 turrets at once but it made it far easier than spreading them out.