Nice art style and I like the way you could build your setup to play the game, the AI pathfinding worked well as the enemy keep trying to cut you off when they grow in larger numbers. It would be nice if all options could be seen at the start, as if you want to create a particular setup or play a certain level you have to keep reloading in order for them to be options (as far as I can tell) it would also be cool to add some sort of boss or end point to a stage, but that might just be personal preference.
Either way, good submission and something that definitely has potential if you ever wanted to expand upon it and make it into a larger game. Good job :)