The game looks and sound great, but I'm a bit conflicted about the gameplay. It's probably one of the games I spent the longest time on, but I'm not even sure if I had fun. I feel that it mostly just appeals to my stubbornness.
I gave up on the final series of jumps twice, before finishing the game on my 3rd try (and fairly quickly, too). I definitely improved a lot compared to my first play-through, and I derive some satisfaction from this, but I still mess up some of the simple single bell jumps about 1/3 of the time. I'm not sure if it's because the game is needlessly precise, or if its because hitting a bell sets your vertical velocity to different values depending on your current velocity (does it? I'm speculating on why I sometimes just don't get enough height). A job well done, nevertheless, and it makes me want to try out other modern hardcore platformers to see what the cutting edge of the genre is like these days.