Ah, that link's more like it!
So, presentation is pretty excellent. The casual tone (music, cut-scenes and gameplay) works well, and everything felt very polished.
To be honest I expected the gameplay to get frustrating pretty quickly - but in fact that didn't happen during the levels I played (up to the pay-wall). I think that means you've done a very good job of balancing the difficulty curve.
I only bothered to collect one of the bonus items - I assumed they were there to aim for on a second play through.
I know there's no helping it, but I would've been happier playing the game with a proper controller - turning was just a little awkward sometimes. (And while I'm dreaming about playing on different hardware, a 3D screen like the 3DS would help no end when judging jump distances!)
I may have been imagining it, but it seemed that the astronaut didn't have a shadow when landing on the level-end blocks. Not really a problem (and maybe it's deliberate?) but I found it a little disconcerting.
Finally, the nearest thing I found to a bug was on the credits page. (That's right, someone looked at the credits page!) The last line of the credits was cut off by the bottom of the screen. I guess my screen ratio (1280x800) is wider than expected..?
Overall, an extremely nice bit of work! I hope its launch goes well.