Every 108 minutes, the button must be pushed.
Don't hit the walls, or you'll sink!
Press and hold the button for a long as you can endure. You might even get on the leaderboard!
Bad at golf? Join the club.
A traveller comes to a fork in the road, and he isn't sure which path he should take. There are two men there: one who always lies and one who always tells the truth. The traveller doesn't know which is which, and he can only ask one question to one person to find his way.
What is his question?
Travel through all the doorways exactly once.
Add a single toothpick to form a mathematically true equality.