There's a lot that's very interesting here, from the world map and the multiple exits in levels, to the three characters you're given that are designed to play around the design of the stages. Conceptually, it's very neat. Those ideas don't come together very well though, with the actual gameplay feeling like a pre-Super Mario Bros. platformer, and the boss fights are bullet-spongy slogs, so it's firmly in the realm of games that are far neater to think about than to actually play.