Difficulty/Reality/IV

The HTML5 episodes, and their unofficial whole-worlds. Only the first half of Whole-world 32 have Flash versions; they are World 53. A new Mixed level is introduced at the beginning of this section; they are timed-jelly levels. The unreleased 3K level is here.

To convert it into the official world number, add two times the number of half-worlds 2*(world number - 10) to the whole-world number. Subtract 1 to the number if it would be on the first half of the corresponding whole-world. Note that World 53 is the final official Flash world.