Interesting at first, but grows tedious.
Two bugs I noticed: 1) I don't have the "Rock the Evildoers" in-game achievement (#47) even though I have #48-50. I guess I never made Commander? I don't want to restart just to get that achievement.
2) My name shows up as ...etc
I usually like Rube-Goldberg-machine games, but I feel like this one takes the worst part of such games -- finicky placement and rotation -- and makes it the entire game.
The rotation controls go every which way, and most of the puzzles rely on getting the placement of elements pixel-perfect. There's a reason The Incredible Machine made the puzzle parts snap to a grid.
What really annoys me are the frequently-required leaps of faith. No clues where to go next, I just have to roll off the ledge or go on the springboard and hope that it's not death waiting on the other side.
I have better things to do with my time than constantly retry the levels until I luck out onto the right path.
It seems a little too luck-based, where winning some of the levels is largely determined by where circles spawn and what power-ups they leave behind.
In levels 24 and 25 I seem to have gotten a glitch where sometimes the circles just stop expanding for a while. Convenient (it let me win level 25), but probably not intended?
I found the controls a little too twitchy, especially when aiming the ball at low velocities--a nudge from me, and the angle would change a lot (45 degrees or more sometimes), making it difficult to aim.
When I first found out about Fold, I was excited because I'd played Manifold (the original, now the Easy levels in Fold) and wanted more levels for it.
I was disappointed because Manifold was very much about figuring out where and how to place the manifolds to get to the exit. The new levels are basically all timing-based; the trick is not where to place the manifolds, but getting out of the way of the moving sawblades. The first level in Uneasy didn't even require the use of manifolds! I was very disappointed at the change.
 "Frontier"){kind=icon}
 "My Pet Protector"){kind=icon}
 "Dynamic Systems"){kind=icon}
 "Professor Fizzwizzle"){kind=icon}
 "Amberial: Nebulosa Realms"){kind=icon}
 "Areas"){kind=icon}
 "Momentum Missile Mayhem 2"){kind=icon}
 "Fold"){kind=icon}
 "Scribble States!"){kind=icon}