My review:
The game was amazing. I don't even like platforms that much, let alone impossibly hard precision platforms, but this one held me to the end. twice.
This game's biggest accomplishment is the amazing difficulty system. Somehow, you made the difficulty changeable in platformer! My first play though I found Vanish to fit just right, and I had a lot of fun with the later levels. The second play-though on the hardest difficulty was just as great, it was like playing the game all over again.
The second thing that held me to the end was the controls and game feel. It always felt just right to bounce around in the levels. You get just enough control over your character to make each level a blast. Even just to hop around the main overworld is great. I played most of the levels.
The game has some minor issues of course, but I'm really just nitpicking here. Firstly the inner ring is horribly laggy, and is not help by the fact that it is large and hard to get around on its own. It might be improved with a button to teleport to the main area on it, but neither really hurts the experience much.
Overall, Its a great game. The aesthetic is cutsy and great, your character feels amazing to control, and the difficulty levels helped me play though in a great flow state. Every time that I though "oh god this game would be so good if it had 'X' " My expectations were met.
10 out of fucking 10.
yeah I said it.