A good and difficult platformer but sometimes it requires a bit too much pixel perfect precision from the player.
As a SinclairStrange game, it is naturally of high quality, as is typical of his games.
And some of those medals are just plain evil! Note if you're not awarded the "complete blah blah area" type medals after you've completed those areas, replay those areas again but this time skip the gameboys. It was a bit odd to have all areas completed except for area 2 ... until I figured out this quite arcane, completely unintuitive piece of knowledge in my trials of "well, I haven't tried this yet, so might as well try it and see if that's it"