Quirky game that, turns out, I really like. I don't know. I guess it didn't look very appealing, at first... It's actually rather addictive. Requires good strategy to stop the onslaught of enemy barreling down on you, and the ability to change it on the fly. Play is technically turn based, but not slow paced, as you might think it would be. F2p is totally possible, but I personally won't have an issue spending a few dollars on a game that absolutely deserves it, like this one. Thanks, devs!