Nice! I like how this game is different from most of the others I've played with multiple characters since you actually have to touch them first before you can use them! I also loved that little joke you threw into the dialogue, "as if something CLICKED inside of me."
Some things to consider: The jump felt a bit inconsistent. At times I could jump a decent amount and other times I only jumped maybe 2 tiles up. Also I found a bug where you would get stuck in the ground if the appearing and reappearing blocks reappeared while someone was inside them previously (if that makes sense).
Overall a neat concept and definitely worthy of expansion and polish. Great job!