I beat Skyblazer for the SNES yesterday. It's only an hour and a half long at the very most, and it's really easy, but it's just so satisfying to play. The level design is sheer genius throughout. The music isn't half bad and the graphics are really nice plus it has a pretty cool main character.
I get the feeling this game is where Sony (the game is made by them) first came up with the idea for their controller. The passwords consist of triangles, circles, squares and x's. Each character corresponds to a button on the SNES pad, but it's a mirror image of the actual PS pad. For example, triangle is the bottom button and X is the top.