Like the concept, do have a bit of trouble getting myself started and finding the right balance in solar cells vs attack towers etc .. However, the game froze on me twice now. At some point, it seems when it gets a bit busy, the visuals completely freeze and I can't do anything anymore. The music continues and the mouse cursor also still changes when hovering over the build panel, but nothing moves anymore.
Playing this on Chrome on Windows 10 64bit.