Great concept, and fun bones of the game, but it doesn't really have any meat on it. Different difficulties would be nice, and I'll continue to play if you continue to update it. 5/5 overall pretty enjoyable, especially at the beginning. Hoping for more towers and late-game content. You could add a machine gun tower and bullet factory, or have the ability to make walls out of iron or wood.
Hi, thanks for your feedback! Different difficulties are already on my todo list. Also, I'm working on making the late game more interesting! :)