The game is pretty fun, but could be really enhanced with a few adjustments. In order of importance in my opinion :
1 : Disabling the hitboxes of dead ennemies (Once, an ennemy ran into a corspse and fly away over the tower, and nothing happened to the tower)
2 : Let the player chose the lane with keys (Sometimes you are aiming at an ennemy and the lane changes automatically so you miss it and you lose the game, and that's pretty frustrating)
3: Shortcuts for skills
However I had a good time playing this game. Keep going this way and have fun developping games.