Fun game! Yet we need more tips and explanations, I had to figure out how the upgrades work by myself, and even the "死" of the assassin (well, a projective which doubles the damage) ... the tutorial was great though, I would see it as a mistake.
Looks like lots don't know "freeplay" stands for, well, it means choosing the action won't waste a turn. And things like "electric" once confused me. We need more tips!