If anyone needs a little help getting started with the hide and seek game, here a little starter project to give you a few ideas. Now you can add the game play to make it fun! (by the way it doesn't have to be hide-and-seek - you could do a 'whack-a-mole' style of game as well where you have to click the bears when they come out for a short time?) Try adding more layers for the rest of the trees (use the erase brush and the original stage image to pick out a single tree then use the 'go to front' and 'go back <> layers' to order the trees the same way as the image has them. Then write code so that clicking on a tree will either make the bear which is behind it come out, or play a rude noise to show that you didn't guess the right tree. I've done the tricky part of the coding for you which is getting the layers initialised in the right order.
Idea and graphics from Cartoon Network. Starter code from me. The final game from YOU!