Every World has 21 ILs but those aren't being tracked because it's infeasible with just how many levels there are.

1 - Under World

2 - Ground

3 - Sky

4 - Space

5 - Mars

6 - Jupiter

7 - Saturn

8 - Uranus

9 - Neptune

10 - Kuiper Belt

The following won't be added until runs are submitted for them.

11 - Oort Cloud

12 - Alpha Centauri

13 - Epsilon Eridani

14 - Gliese 581

15 - Bellerophon

16 - Algol

17 - Betelgeuse

18 - Horsehead

19 - V V Chephia

20 - Crab

21 - Supernova

22 - Black Hole

23 - Milky Way

24 - Magellanic

25 - Andromeda

26 - Quasar

27 - Big Bang

28 - Nothing

29 - Time To Go

30 - Planck

31 - First Galaxy

32 - Unknown Planet

33 - Solar System

34 - Triton

35 - Miranda

36 - Oberon

37 - Pandora

38 - Titan

39 - Europa

40 - ???