This was a little stressful and confusing at first, and I wasn't quite sure which unit was doing what. I had to read a few comments before I understood how the game worked (and I still don't know what Energy Farmer does) but after that, I had a fun time playing the game. I found it a lot easier to just drag and drop rather than move my L-shape. The game did get a little monotonous after a few waves but the core loop is fun and there's potential if you choose to expand it.