Tunnels is a game about a man who travels thru various tunnels while battling with bats, giant spiders, and dragons. Your job is to eliminate the threats so that he can complete his journey. You merely need to tap on the screen with your finger on top of the threat to eliminate it. There are five different levels that have 3 parts each. Each level in addition has 2 more levels. There is a lot of action and challenging scenes. After you complete the five levels, if you can, there is a free bonus level, where you have five minutes to score as many points as you can.