First of all, production value is crazy good, you guys made a full fledged 3D platformer ! Controls feels good, hitboxes are very functionnal, there's no downside on the gameplay part :)
But I'd say it falls a bit behind on game design, I understand the concept of platforms being tied together, but for the most part it feels like a classical 3D platformer and I can't see something really unique in terms of game design.
Also I won't complain on level numbers, it's only 3 but it's also enough to show and understand the concept :D
Really good game overall !