Important think to know:

• At the start, there is an orange portal out of the map, don't ask me why, We can use it to skip some levels.
• You can clip through 99% of the walls especially on the thin one.
• Portals speed is the same than your speed so I can't really use them to go faster.

Levels comments:

• Level 1:
  • I use the orange portal oob and I clip through the wall to directly go at the end.
• Level 2:
  • I just jump, I could place a portal on the roof but this is slower.
• Level 3:
  • Same as level 1
• Level 4:
  • Some clip and some jump
• Level 5:
  • Same as level 1 and 3
• Level 6:
  • As I go at the same speed than the portal, shooting from the start and waiting (and clipping through the last wall) is the faster way to do this room.
• Level 7:
  • Same as level 1 and 3 and 5
• Level 8:
  • A few skips to try to not loose a lot of time here because of these stairs.
• Level 9:
  • Same as level 1 and 3 and 5 and 7
• Level 10:
  • Really timed clip to place the two portal really fast. TAS stop before I finish the game because I don't need any other input.
  • I've found a faster way to place the two portal but I'm not teleported for not reason.