Umihara Kawase is a very fun (and hard!) puzzle-platformer for the SNES. There was also a sequel for Playstation, called Umihara Kawase Shun Second Edition.
There is very little information on the internet about these games. Let's make this a general helpme thread for tips, tricks, and secrets!
http://en.wikipedia.org/wiki/Umihara_Kawase
Here's some information on the game.