Really enjoyed the 3D platforming, smashing things and collecting things are always enjoyable activities in a game and are combined to great effect here. Getting the new powerups was cool, once I got the last one I had to get all the ore fragments even if they fell all the way back down that area lol.
The outdoor environment was a particular highlight for me - seeing the rings off in the fog was both serene yet eerie in a way, and I love in the end when there are ore chunks just spinning off into the air. I had one fly right at me and tried to vacuum it up, alas I missed XD