Don't expect to be able to play around with this particular feature for a bit.
There are five difficulty modes coming to Ultimate! Three of these (Easy, Normal, and Hard) actually change object layouts to make the level easier or harder. Easy is meant for people newer to platformers and Hard is meant for people who are way too good at platformers. If you thought Barrel Canyon was hard now, wait until I actually make the hard mode layout.
Very Easy is like Easy except you always get 10 hearts upon starting a level or dying, while Stupid is the true ultimate challenge: Hard mode but you can only take one hit!