Great stuff! Took me a second longer than it should to figure out what I had to do, but once I got it, had a nice first experience.
I'm glad you enjoyed our game. That you had trouble understanding the game is our fault we should have implemented a tutorial.
Might be a better way to do it than a tutorial.For instance starting the game off with the shield active, and perhaps disabling the lance - then auto switching when you absorb your first energy.