There are some advanced movement techniques required to beat certain floors in the dungeon, like this one:
Most of which center around creative uses of the Dash ability.
Dash grants you a temporary speed boost.
So if you Dash while on the ground, and immediately jump, you will jump farther than usual carrying your momentum into the air; this is called a Jump Cancelled Dash
Combine this with the technique of Dashing while in the air, and you can cross some fairly large gaps.