If I don't mention a level it just means no skips have been found (yet) and to do the level as intended.

You're not required to do any skips, if you don't feel ready yet or it is too inconsistent to do in a run feel free to ignore it and do the level as normal. Speedrunning is supposed to be fun so if a skip isn't fun for you don't do it. (Better to do the level normally and succeed than repeatedly miss a skip[unless I note how many retries are fine])

There's no need to get breakfast on the first day, go straight for the elevator the code is 1313. For every morning after you need to get breakfast.

Dialogue skip: After entering the first code Cooper gives a long explanation and the doors won't open until it's finished. If you enter the elevator, quit and re-launch the game the dialogue won't restart and you can continue with the puzzles. This saves ~20+ secs.

1_04: If you go roughly where there's a break in the white line and hold forward towards it and jump. Then let go of holding forwards and hold left, as you're about to land hold forwards and then jump in quick succession, you'll make it over the railing skipping the level. This saves ~20+ secs

1_05: It is faster to do the right side first then the left.

There is a skip, if you frame perfectly, restart 1_04 as the elevator is closing, you'll progress to 1_05 but remain in 1_04. So as long as you don't die you can replace 1_05 with 1_04.

Floor 2 code is 5382

2_01: Instead of completing the red and white puzzle you can go to the corner opposite where the green cube is. If you then jump and look at the right angle you can just about see a few pixels of the green cube to collect it and finish the level. This saves ~17secs you can retry ~7 times before it's slower.

2_09 Pipe jump: When you enter the level on you're left is a pipe you can jump from it to the end platform. This saves ~50secs and you lose ~8secs per retry.

Floor 3 code is 3159

3_02 Teleport skip: You can collect red teleport to the back and jump across to the exit. If you then enter the exit while facing a red teleporter and teleport early you'll trigger the end of the level but get yanked out. The animation for beating the level will warp you back in and this counts as beating 2 levels. On completing 3_03 you will skip 3_04 and enter 3_05.

3_05: You can collect red and teleport then collect green and teleport to the end. If you stand in the corner to the left hold backwards and left and teleport at the right angle you will clip through the wall. This saves ~42secs you can retry ~9 times before it is slower

3_06: After collecting red as normal it is possible with mashing at 10cps to teleport oob while standing behind the red teleporter (The one on the left of the 3 at the end). Keep mashing and aiming to be in the centre and slowly higher and higher. Eventually you can hold back and jump, this will get you over the blue barrier. Saves ~30-35secs first try.

3_07: You can just stand just in front of the pillar in front of the red generator then Aim roughly where blue is behind the horizontal white bar above the second pillar and stand a little bit back to collect it through the wall.

After like in 3_02 you can do the teleport skip again. On completing 3_08 you will skip 3_09 and be back on floor 3.

3_08: You can go left teleport to white then stand near-ish to the teleporter and look down left into the room where the blue generator is. You can collect it through the wall.

Floor 4 code is 2021

4_01: After rotating the level you can enter the hole at angle to land on the wall and fall down. This saves a couple seconds of rotating back and forth.

4_02: Again like 3_02 and 3_07 you can do the teleport glitch. The angle is a little steeper so give an extra split second to enter the exit before teleporting or you might miss it and need to redo the level.

IMPORTANT: When you gain control in 4_03 restart. Doing this level is slower and after doing the teleport glitch successfully you will skip it and get sent to 4_04.

With the correct angle and if you mash teleport at ~10cps, it is possible to get a double teleport. This will send you straight to 4_04, same as before restart in this level to get sent to 4_05 as it's faster. Saves ~20+ secs over single teleport.

4_04: You can go left across the blue bridge and collect blue. Go back across swap with green put it to the right and collect blue again. Go through the blue barrier and swap with green. You can make the jump diagonally across turn around and rotate the level to finish.

4_05: You can go left around the big cube and collect red through the window and put it on the big cube. Take blue and go through the blue barrier, take red put it in a different window take blue back. Go through the blue barrier and finish from there.

4_06: Go right and rotate the level. Aim far right and a little up on the white teleporter and teleport so you land on the raised area to the right. Go forward and collect green on the ceiling. Jump teleport to green and restart anytime before you reach the teleporter, this will return the level to its normal rotation so you can finish while also getting you over there.

4_07: You can clip out of bounds by standing against the white barrier, looking between the two lines of dots on the frame and then standing off centre looking at the edge of the teleporter finally teleport and hold forward and left. Make sure not to hold them for too long after you're in or you might get shot back out. After follow the wall not going back in bounds / missing the deathplane to get to the end. This saves ~20secs

4_08: Go as far as collecting green and teleporting back normally. rotate the level and teleport to the top green teleporter so you land on the pipe. Stay flush against the wall, look away from it and straight up. Aim to be in the centre of the outer ring, then slowly bring your aim straight down until you can teleport. Make sure you're not holding any other buttons and teleport. You'll clip through the wall, carefully fall down on top of the wall to the left and jump into the exit.

This saves ~50 seconds you can retry it once if you die / are too far to do anything. Backup 1: Although if you're quick enough you can turn around and teleport back with green and try again without needing to restart. Backup 2: Also if you fall you can collect blue from the generator through the small gap, put it on the white cube that's normally to you're right from the entrance and then teleport back with white. Rotate back collect blue and finish

Floor 5 code is 1474

5_01: Do the level normally up until you enter the red puzzle. Go to the red generator, collect red and rotate. Turn around jump over the pipe and teleport to red at the bottom and collect blue. Teleport to blue and stand on the raised area, go as far right as you can and aim as far right as you can on the teleporter while jumping. As long as you're not holding anything usually you will clip out to the right and fall. Get your bearings and aim for the red cube at the entrance near the blue cube. Swap it and teleport back in bounds with red before you can't see the level anymore. Get back to the entrance holding white and leave. Collect blue and finish from there.

This saves ~1:30

This is a harder strategy to save another minute. Not sure exactly where to stand / where you have to aim for it to work yet. However, a crucial point is that you need to walk forwards towards the wall then let go and not hit any directional keys until after you've launched, for whatever reason it increases the chances of getting launched considerably. As long as you don't hit / enter the corridor above, you can try land directly in the end elevator(or near it). If you get the correct height but overshoot you can try and navigate to the rotation tiles on the same train platform as the exit. If you get launched too high, above the second puzzle you can either enter it then leave as normal or try fall on to the rotation tiles like above. If you just don't get enough height you can fall into the room below the exit which is the normal rotation area you would access with blue and use the top white teleporter to get on the wall and activate the rotation tile from there.

Credit to Marin for discovering the teleport skip in 3_02, 3_07 and 4_02 Credit to Day9 for discovering the 4_05 reroute.

Feel free to leave a message on the forums or DM me on speedrun.com if you have any questions / suggestions.