Jump first on the left, then from there jump on the right. And you'll discover the hole game!
The first jump was flat out impossible for me on Chrome Version 31.0.1650.26 beta, even in incognito mode. Tried in Firefox and made it easily ...
I tried that. I fall. :-(
Google Chrome
Version 33.0.1750.149
Linux Mint 16 Cinnamon
EDIT: Update- It does work, at least sometimes. I guess it's just my clumsiness.
On Safari 6.1.2 the second jump in the first level only works 50% of the time. The other 50% the jump only registers by the time the thingy has hit the ground.
Once on the ledge to the left, need to press up and right arrow at the same time to jump to the higher ledge on the right.