Head over Heels is a 3D platforming puzzle game from the early 80s. It was first released for the ZX Spectrum and had an unusual isometric view. The player controls two creatures, named Head and Heels. Head jumps high but is slow so he is not able to get far. Heals is faster but doesn't jump very high. They move as two separate creatures, but can join and get the benefit of having both specialities. (giantbomb.com)