Arrow keys to move, up arrow to jump, space to spin jump, X to fireball with fire flower Z key to dash, space to enter level, C key to open item stock. (There are four levels, and each time you clear one, the next stage opens.)
Thanks to _nakashima for the original game. Thanks to BlingRevived for collab and some of the beta sprites and music. Thanks to BlingRevived for the inspiration. The Cutting Room Floor for screenshot studies.