Ogmo is a failed experiment stuck in an abandoned lab, and it is your job to get him out. Your only weapon: the ability to double jump. And double jump you will, as Jumper contains some of the most inspired, hardcore, and incredibly tough-but-fair stage designs ever. Any hardcore 2D platformer fan will love to hate the intense difficulty. (taken from Developer's site)
Considered by some one of the hardest freeware platformers, is the game Jumper where you will need precise timing to succed in. Despite the difficulty it's good enough to keep you trying that same level over and over to try and complete it.
Developer: Matt Thorson
Site: http://mattmakesgames.com/games.php
Status: Freeware. Hosting not allowed.
That last screenshot there.. Really hard.
Jumper
Moderator: Game Hunters