HAY GUYS, I found out that despite spacebar being the normal jump button in these sorts of games, you have two types of jump in this one. Spacebar does the forward leap. You have to use the middle and right mouse buttons to get both leap and straight-up jumps. I dont know the keyboard equivalent of up jump yet. The game is just focused on jumping apparently, with lots of wall hoppery and the like, but it's fun to mess around with. And you can't beat free.
You can also configure your player with a different skin and color. I picked
gweeeen.
For multiplayer we didn't bother going to the trouble of opening router ports and crap, we just connected through
Hamachi, which creates the equivalent of an encrypted LAN between people, bypassing firewalls entirely.