Thx you!!!
I thought about adding towers, but I have no idea how to implement this, if you have an idea pls tell me (=
I honestly have no idea how to do that with one button, maybe you could add a popup every x points to give the player an option to spend points to get a randomly placed tower? I can't really think of a good way to choose where to place it, but it's a start. I didn't mention this before, but the main menu and all the different gamemodes are really cool.