Click the map to change it then click Start to start. Click the arrow in the top right to open the shop and use the red arrow to navigate in the shop. Click a tower icon in the shop to purchase that tower and click again to place it. Click a tower to select it, while a tower is selected you can upgrade it, change its targeting, and sell it.
I've been working on revamping some of the art as well as the fuctionality of the blade tower and some balance issues. This game isn't really finished, but it works. The biggest problem is with the layering. If you have any ideas for towers or upgrades please tell me. I'll hopefully be adding more maps, towers, upgrades, and rounds.