I liked it up untill I tried getting to the secret ending. I've done some Hard levels but jeez, if those were hard this is very hard. I mean, there's pixelperfect and there's this piece of sh*t. The rest of the level was good, just about hard enough (though due to some jumps not really 'normal' either) but it was very doable, I loved the challenge and it was pretty neat how some stuff was hidden. Getting to the other ending is a whole different story, it's not even challenging to me because it's just too darn hard. Now I know this is partly my own skill talking, but it's also the way you 'balanced' the difficulty throughout the level and putting the [normal/hard] sticker on it. It just isn't right...
And really, I don't mind dying 20 times, but it does get old pretty quick when you find out the next screen is even worse. I got as far as the screen with the 2 buttons on it. If you're going to produce more levels (and please do because I really liked the style of the level [meaning: the only enemy is a bad jump or a lack of exploration of the level]) try and balance the difficulty better, and tag it properly.
If the secret ending would've been just a tad easier to get to it would've been really great.
Oh and P.S.
I hate not being able to finish a level, so don't think I'm a quitter or anything, yours is the first level I just CAN'T finish... and yes, that does piss me off a bit =P