I do Source Mapping but mostly for Portal and Portal 2. I'm the main mapper of Portal: Project-Beta, Blue Portals and I'm also a mapper for Portal: Alive and Kicking. I do mapping for other Source games such as Half-Life 2 also.
A Little Higher is a mappack for Portal 2 that features the Repulsion cube, a cube that fires Repulsion Gel. Original release date: July 7th, 2011.
Jump A Little Higher!
A Little Higher is a small mappack containing 5 short, and simple puzzles using a new element, The Repulsion Cube. With this new element, players can control the Repulsion Gel at their will to solve puzzles.
NOTE: Installation is not quite as you expect as it's ment for those people who want to have the full mappack experience I've created in 2011 and to have it kept organised. It involves you editing the gameinfo.txt under portal2 and extras.txt under portal2_dlc2/scripts.
Alternatively, you can just download the workshop version: