Magic Pockets is a platformer created by The Bitmap Brothers and published for Atari ST and Amiga in 1991 by Renegade Software.
It was also ported to PC, Acorn 32-bit, Genesis/Mega Drive, and other platforms.
The Bitmap Brothers are well known for several legendary titles such as Gods and Speedball. Magic Pockets is one of their less-known creations. Even if nobody will consider it the best platformer ever created, it has excellent graphics, good sounds, nice intro music (pity that there is no music during the game, probably the only big flaw), and very original ideas.
Just try it, if you don't like it, you can still go back to Superfrog or Zool :)