First off, too hard.
Couldn't ya at least have had a save point per room? There's games that's extremely hard, but they are still rewarding. This one feels like it gives ya the finger each time ya die. I didn't get further than a few rooms, which is kinda why i am so annoyed.
After passing the first room fairly quickly, i got to the first save point. The thought i got there was like "Hell yes, i fucking beat that god damn cloud!".
Then the next one never came. Well, it probably does, but by the time i've gotten far and then died. I just have to do it over again.. and again.. and again..
There is no reward, whatsoever. By the time you're done with this game, you've got raw hatred against it. This is not a game, this is an endurance test.
I mean, okay, challenges are good, but a challenge without a reward does not make it worth it. The game doesn't get fun, at all. I'm giving this game 1/5
Good luck with future game however.