That's exactly what happened with Fret Nice, the Pieces Interactive-developed, Tecmo-published, "musically endowed" platformer that hit the PlayStation Store last week. (The folks at Tecmo swear it will hit XBLA at some point, too, but have yet to specify an actual date.)
One part Loco Roco, one part plain ol' loco.
Now, the hook of Fret Nice is that you can play it with any one of those 45 guitar controllers that are sitting in your basement or garage. Thankfully, it can be played with a regular old DualShock 3, too--an important distinction should I ever buy a PS3, as I don't have a single guitar controller and probably won't get one anytime soon.
Anyway, what drew me to the game wasn't its control scheme--it was its art style. I'm really diggin' the paper-doll look of the characters and the environments.
Of course, I'd probably be more interested in how the game controls if I had a better understanding of that aspect--something I can't say even after watching the following trailer:
The game's designer, Mårten Brüggemann, tries to explain things in this recent playstation.blog interview, but truth be told I'm just as confused after reading it as I was beforehand.
See also: 'Next up: Saturn!'