Good things:
- Color palette is nice.
- Game concept is cool.
- Level selector is simple, but efficient.

Issues:
- FOV and camera motion gives me motion sickness. I'm specially weak against it, so I need to tweak fov heavily in every fps game I play. Having no fov control makes me unable to play the game for +10mins without my eyes hurting real bad. Probably a very niche issue, but just letting you know.
- Friction doesn't feel like cardboard, it feels like ice. Takes way too long to stop, which makes the game feel very unresponsive.
- Air control suffers from the same effect, specially when going up the elevators with some inertia from getting into them. The tutorial stages should feel easy, but they are really hard because of this.
- Fire kills you before the particles visually collide with you. Can have situations where there is no way to know if you are going to be killed, since the fire may activate before you pass (even if you don't see fire in your screen).
- Camera clips really weird against walls and against the boxes if you are holding one and look straight down (at least on top of the tower with two boxes, third level)

Sorry that I couldn't put some time into finding more positive things. Motion sickness makes me feel really bad, and I literally can't play for more than 10mins T_T