Interesting take on a tower defense game! :D
The graphics are great and low poly designs blend really well!
Although I have some critiques to make, mainly the fact that the game is a bit too hard in my opinion. The enemies are a lot and they swarm you easily. I would've also liked to be able to shoot the laser myself instead of waiting for it to autofire when aiming an enemy.
Also maybe having upgrades would be cool? (if there are I missed them)