Don't know if anyone will like this or not, but it's similar to other forum games. So pretend you're in an obstacle course and the posts are the solution to the previous obstacle and also to the next obstacle. So in your post, you would say how you would solve the obstacle in the post above you and then post your obstacle for someone to solve.
OP: There is a fence
Post2: Jump over fence. There is a swinging rope that swings to another platform
Post3: swing over rope. etc. etc.
Pretty easy but should be more complicated.
So here's the first obstacle:
You are on a high flat platform balanced on a tall pole and falling off would cause death. You cannot see the bottom except for a slide that starts 100 meters below you and slides down into to somewhere you can't see. In the center of the platform is a boulder 10 times your weight and a knife. There are also two ropes, each of the ends are tied to a corner of the platform. The center of these ropes are suspended by a pulley 25 meters high.
How do you reach that slide? Where does the slide take you?