Your goal, besides not getting flattened, is to collect the gems and treasures along the way. Avoid getting hit. You only have three hit points. Hitting yellow boxes costs you half a hit point, while red boxes cost a full hit point. You clear a level by passing through it, even if you didn’t collect anything.

There’s plenty of replay value in this game. You might consider playing a level several times before you attempt a collection run. This way, you can get a better idea of the level’s layout and work out a better strategy.