Finished world 1 and 2 -- what now?

[Tiglionabbit]

I got every egg in the first world (kappa guy's fishing area) and the second world (armored armada). The game told me so. I don't know what to do now. It hasn't given me another ability yet. The last one I got was the ability to smash downward with my horns. It keeps hinting that I can destroy cracked floors this way, but I haven't seen any. What should I do? Can you give me a hint of where to look? The only thread I haven't followed is the egg that says something about high up where the "kee-hees" are, but I'm not sure what that means.

[emge]

In the main cave (where "Sage" is) is a waterfall. Underneath it is a pool where you can "horn dive" into. There you will find a door with a 1 on it. If you have fed the baby dragons and thus have at least 1 heart, you can open this door with a "tail spin". Behind it is the Kee-Hee cave.