YES it has a little microtranaction in it, if you don't like it then please ignore it.. it's just a dollar for extra gameplay, no big deal.

Protect your town from elephants and rats using the mouse and keyboard in the same time. Use A and D to control the bow, and mouseclick to control the hammer. Kill elephants with the bow and mice with the hammer, don't kill the humans! For microtransactions: bow is mouse and WASD is hammer.