Levels (Spoilers)

This is more of a tool than a devlog, but I think someone might find it cool. As I'm going through these lists, I'm underlining things that I've finished and made into levels at the bottom.

List of all the concepts that can be taught (not in order, not exhaustive, includes a difficulty score)

1. Movement (1)
   
2. Goal (1)
3. Sokoban (2)
4. Mirrors (1)
5. Emitters (1)
6. Photons (1)
7. Receivers (1)
8. Boxes (1)
9. Buttons (1)
10. Filters (1)
11. Two Filters (2)
12. Mirror Filtering (2)
13. Passing through mirror (1)
14. Colour Indicators (1)
15. Self-Colouring (2)
16. Exit Colour (2)
17. Floor (0)
18. Walls (0)
19. Lava (1)
20. Lava Blocking (2)
21. Lava Walking (1)
22. Box Phasing (3)
23. Box Shifting (3)
24. Mirror Rotation (1)
25. Box Mirrors (1)
26. Box Mirror Rotation (1)
27. Box Prisms (1)
28. Diagonals (1)
29. Prisms (2)
30. Prism 45 (1)
31. Dual Use Prisms (2)
32. Prism Splitting (1)
33. Prism recombination to white (2)
34. Prism recombination via pane (2)
    
35. Prism recombination via prism (2)
36. Prism Serialisation (3)
37. Prism Channel Swapping
38. Doors (1)
39. Multiple Doors (1)
40. Colour Shifting Down (2)
41. Colour Shifting Up (2)
42. Exact Filters (1)
43. Copy Mirrors (2)
44. Slider (2)
45. Carriage (3)
46. Serial blocking (1)
47. Block Swapping (2)
48. Half Mirrors (2)
49. Invert Filters (2)
50. Infrared (3)
51. Ultraviolet (3)
52. Limited Steps (2)
53. Airlocks (1)
54. Darkness (3)
55. Black Photons (3)
56. IU Prisms (1)
57. Looping Photons (2)
58. Photon Storage (2)
59. Half Loops (3)
60. Copy mirror push duplicator (3)

Assigning them to levels, calculating the total difficulty score

Basic Levels:

1. Movement, Goal, Walls, Floor (2)
2. Boxes, Buttons, Doors (3)
3. Sokoban, Multiple Doors (3)
4. Emitters, Photons, Receivers (3)
5. Diagonals, Mirrors, Mirror Rotation (3)
6. Filters, Colour Indicators, Lava (3)
7. Two Filters, Lava Walking (3)
8. Lava Blocking, Box Mirrors (3)
9. Mirror Filtering, Airlocks (3)

Prism Levels:

1. Prisms, Prism 45 (3)
2. Dual Use Prism, Prism Splitting (3)
3. Prism Recombination to White (2)
4. Prism recombination via Pane, Passing through mirror (3)
5. Box prisms, Prism recombination via prisms (3)
6. Prism Serialisation (3)

Looping Levels:

1. Copy Mirrors (2)
2. Looping Photons (2)
3. Photon Storage, Box Filters (3)
4. Block Swapping (2)
5. Slider, Serial blocking (3)
6. Train (3)

Figure 1, a level (level 9) shown in the scene view.

Oh, and some feedback from Lindsay (and others):

• Emitters / receivers are hard to distinguish.
  • Changed the indicator for receivers to be a square as well as the shape
  • Swapped contrasts to make the "shooty bit" of the emitter more obvious
• Background tiles "plus" pattern is a bit much
  • Reduced the brightness of these by about 60
• Hard to tell if a level is complete
  • Made different graphics for a complete and incomplete level
• Can't immediately walk back to a previous zone
  • Added a specific case for zone transitions to allow this
  • (Was originally disabled to stop people instantly going back into a level they had just beaten by moving against the wall)
• Weird undo bug
  • Caused by exiting to menu after performing inputs and reloading, fixed be reorganising logic
• Post processing was uncomfortable for some
  • Added option to enable / disable in settings (preserved)