I wish you had more time to polish. Teleporting to an enemy's space when you kill could be really cool, but in a wave based shooter it doesn't really do much. It would have been better (I think), in levels where you have to use this to progress. Also, instant teleportation is pretty confusing, more often than not I didn't know where I ended up. A smooth transition would be better.
To sum up: I see a good potential, but it feels like that teleportation mechanic is not in the right game.