We figured out that it was somewhat unclear without a tutorial! We are sorry for that, select a character and move it next to a rock, then you can see it turn green and click it to move it and allow you to walk past the puddle!
omg haha, I played it again and I see how this game if you had more time could really be a fun puzzle game. Thank you for the hint. I realized the art style reminds me of he is coming. Something about the simple aesthetic is so pleasing. I feel the best kind of puzzle games are like this. super simple concept but then the game introduces new things slowly which you showed even with a few levels.