Thank you for the time in putting a considerate feedback. Sadly that's on us: you can push wooden boxes with the fan (but you did a perfectly reasonable thing: you pulled it in the water yourself) and the one that moved autonomously had a robot above it. We tried to give the player a hint: you can stand on boxes and push yourself forward with the fans. Accessibility and tutorialing issue from our side! We're sorry that interrupted your gameplay.
Thank you again for the time you putted in our game.