I enjoyed the elements that are here quite a bit.
One small suggestion: I think the Shockwave should either be an activated ability or should be predictable after a certain number of attacks/destroys. It doesn't have much identity to distinguish it from the lightning as it currently stands, and since you can't plan around when it will trigger, I found that it would often disrupt patterns in an undesirable way.
Fun stuff. Looking forward to the release.