It's a very polished game that feels very good to play! The level design is great and showcases all the different features that were implemented. I particularly like the part where you get thrown in space by the ring. It leaves you craving for more!
Some minor inconvenient: : Falling of a platform can sometimes be slow, and you have to wait a while if you don't want to restart the level and sometimes the gravity switch can be a bit unpredictable.
All and all 10/10 would recommend!