I like it, though it's a little slow going. I'd agree that speeding up the coins would be nice as zombies can swarm over them making it a bit hard to switch between all the attacks to clear space to get to them. I'd also make the colored zombies a little more clear or just the solid colors as in the beginning the blue and green seemed a bit similar to me as it's only a few pixels different. Still though, really good job for your first completed Game and Game Jam