I feel like the game could use a menu screen and a tutorial tbh.
Regardless, I really like how the when you start the game, an enemy spawns right next to where the tower starts, acting as a mini-tutorial showing the tower destroying the enemy. That's pretty smart! I like that.
I think the player's movement speed could be increased a bit, but it's not a major problem. The game's very basic and simple, but less is more so it's OK. The game is pretty barebones but I still like it regardless