Use the Arrow keys to move, and up arrow to jump. To kill one of the"boss's" heart you have to touch "him". At the end there will be a cut scene.
This takes place when Rainbow Cube 3 took place. Instead of the cube's side it is the circles side. My YouTube Channel Were I Post Tutorials: https://www.youtube.com/channel/UCHJTFkT6qzEjPWDl0TFLnKw?