I do like tower defense games. It was interesting to come up with the best path to get maximum use out of my towers. I ended up sitting on a spiral like path and then a snake like path so the enemies would double back on themselves. I did run into an interesting problem where if I spawned the onion on the purple spawner, it would create a tonne of lag in the game.
It would be cool to add some additional tower attack types in the game!