Done, fully cleared it. Third Bubba on Inumore was tricky. I was surprised how easily I cleared Reflect with 0 deaths, it previously took me like 100 lives to clear it once. Irys stage was the hardest one to not die on. The only complaint I have is a long intro on Pop on Rocks. Everytime you die and restart, you have to wait like 10 seconds for the level to even start.
It took a while for me to notice it, but it is super easy to get and there's no risk after you figure it out. After the long spike trail, you headbutt a dog so it goes on the yubis and reaches where the first button is. After that, you use momentum of the jump to do a normal jump up to the Bubba. You could also groundpound, but that's way less reliable. Ride the dog at the button and when it is going up, you jump too. Like you do to clear Nothing.