I'm surprised this game never got its own thread since its release nearly 2 years ago. I would have missed it too, if it wasn't being given away for free on XBL until mid-May. It's one of the best indie platformers yet. Very Metroidvania-ish. What's most remarkable about it is that it's the labor of mostly one guy. Only when he got the attention and patronage of Microsoft did he get the budget and the inclination to hire a music composer, a story guy and some voice actors. The author's own
postmortem story is a good, informative read.
I'm almost done with it now, and I have to say I've really enjoyed the experience. Remarkable work from one obsessed workaholic. You'd think it came from the 2D Ubisoft team.
It's available on Steam too (though not for free, I don't think).