Epyo the Great posted...
Bit.Trip Runner - I love the Bit Trip series, I haven't played the last two games (this is the fourth). Of the four I've played, this was my second favorite. It's hard as heck, but forgiving. Keep in mind, however, that the gameplay isn't extremely interesting. It's a guitar hero isomorphism, and without chords. It looks great, it sounds great, it's fun, but it's pretty easy to get sick of. You either do the level perfect, or you make one mistake and immediately start it over.
So... what's the forgiving part?
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