Hedgehogs and their spikes. Imagine, that in this game they will use them for collecting apples. It is important, that you collect everything in each level, which isn't always easy. Use simple mechanisms, like wooden logs, stones and magic ingredients. If you click at stone slab, it transforms into wood and falls lower. Another click reverses the wood back to stone form, which stays in current position. Magic ingredients represent toadstool plus lemons changing gravity and mushrooms making hedgehog half-size. If something goes wrong, just restart the level.