A very fun and well-made platformer that features four characters with four abilities, all of which are definitely useful and should be used with some frequency. My main complaints are: it's light on content, though you sort of expect that from a NES platformer, and some of the bosses aren't the best. Some are a little too simple and some have an attack or two that's a bit cheap. Also, there's a weird and unintuitive obstacle at the very end of the game.