The poor princess is waiting to be rescued, but getting there involves a succession of rather silly contraptions and curious little riddles. There's no need for quick fingers or elaborate commands. Just inspect the surroundings, try a few unlikely ideas, and see what happens when you prod the right thing.
The full game is already unlocked, so the entire little rescue story is available without extra level unlocks. Its hand-drawn characters and playful music give the whole affair a quaint charm. Perfect for a quiet spell when you fancy a few puzzles without committing to a lengthy adventure.