Crawly the caterpillar is stuck on a river island, the only way for it to escape is to crawl over the floating logs of wood. The player has to tap the screen to move and stop Crawly. Each log crossed successfully gives one point.
The river is flowing in full force so the player has to be careful and stop the caterpillar by tapping the screen only when the head/tail is on the log of wood. If they player stops the head/tail when over water, Crawly will fall into the water and die. Crawly has a limit to which it can stretch so the player has to be careful and not let it stretch to its maximum length when Crawly is over water.