A fun spin on the paper plane games. It took me an embarrassing amount of attempts to get past stage 5, but I got it done haha, I enjoyed it. I would just consider giving the player a starting amount of currency at the start of each stage (or maybe even combined across all stages) and have placing fans cost money. You could have a score for the amount of money the player finishes the level/game with, this way the player has an incentive to find the most optimal path through each stage using the least amount of fans. I think this would add a lot more to the game.