You were right to ask, when there is a hole on the tower you have to take the hammer, go near the hole and press the E key, this way the player will repair the hole with a cartoon-style cloud and then automatically jump out of the cloud, unfortunately there is currently a bug on this system because while there is the tower repair animation the player should stand still, instead it moves, that's why it's better to retry the game when we have done the necessary fixes later