This is the bunny level. It's probably also the first really annoying level, but relatively linear. Hop all the way forward until you get to a slope. Hop up the slope, jump over the gap, then turn right. Hop up some more, then loop around and keep going.
On the right is an outcropping over the path you already took. The controls are horrendous. Hop off the ledge onto the next ledge. Don't fall. Then jump into the water and follow it to a grassy hill. Keep going, hop back into large rocks in the water, then back onto the grass.
When the second bunny joins you, keep going forward, into the water again, then onto the grass. Jump in the hole to end the level.
In lieu of an actual walkthrough, here's a roadmap to guide you.WTBMH roadmap (not quite a walkthrough)