Gather flowers in 100 meticulously crafted levelsUnlock and complete challenging hidden bonus levelsAchieve tricky bonus goals on every level, with many unique varieties (think "crack all the ice in the level" or "jump at least five times")Experiment with tons of different objects, including teleporters, freeze bombs, blocks of slime, and dark matter that "voids" anything it touchesAccess an additional 100 challenges in a difficult optional postgame