Simple in concept and deep in technique. The problem is that the three different areas barely offer anything the previous one already did, so there's a distinct lack of variety throughout the experience.
A platform-style puzzler that's clearly aimed toward a young audience. Older players will laugh (at least, they ought to) at the game's simplistic controls, straightforward puzzles, and rudimentary graphics.
And sound, the final frontier for every Worth Playing review: adequate. MIDI songs, completely unmemorable. Clearly digitized sounds, somewhat unsatisfying, but videogame-y enough. Your ears will hear, but your brain will not be stimulated.