Hmm...
I find it funny that so many people are commenting on the lag (I didn't have any), but not the actual game. Time to break that chain! :)
This game was extremely fun and addicting. Once I started my first jump, I was hooked for about 10-15 minutes. There are plenty of fun upgrades and customizations for your character, and that Spacebar tension releaser saved my ass several times during gameplay. It definently kept my attention, and had a couple laughs. Especially when my character spontaniously combusted when he touched the ground, even going at a low speed and altitude. :P
Definently a great game to kill boredom for a while. I give a 10/10, and a 5/5.
For a quick suggestion, I'd say you should add upgrades for the character itself, like a parachute, a change of scenery, flying obstacles to make it challenging... or a giant freaking rocket that can shoot you clear up into outspace! >:D