Repost from my rating comment
Starting positive, I love Moom, I love what you're going for, I love the art direction, and I love the map design. It took me a little over an hour to get to the credits, which I could get without needing to collect literally everything. The movement controls are fun and you get to do some silly things with the physics.
However, there's a numerous amount of bugs, the camera can be the enemy, the menuing in general is a bit tough to navigate, and the separate pause menu isn't obvious to reach. The combat is strained, with the power abilities requiring rune energy and the reach being barely larger than most of the Ame's leads to a lot of running around waiting for the energy to recharge. But the biggest depressing thing for me was that I couldn't find every item so I couldn't see every area or figure out how to get through the miasma at the bottom of Fauna's tree. I could never find a second part to the red bookmark. Maybe some sort of menu option to be able to turn on an arrow that points to the items so that we can explore and still get the item as intended without missing out on content would be nice. Some notable bugs: Opening the game after beating it locks you some sort of inescapable cutscene. Often the map pages are obscured by a blank page in the journal. Sometimes I get locked in an animation and can't move when I warp while falling or sliding down a wall. Overall, this game is great, I love so much about it, it just needs polishing.