Count the Blues, 8:
http://www.youtube.com/watch?v=zo7QFUXv4pM
Kind of hack, but works 
^ That one might not work if the configuration of boxes was different.
achrenico it’s a hack 
But it counts
My 10 register solution for Mirror 2:
http://youtu.be/4ebDmfsplyM
I saw that Andrew Stacey found a 10 register solution, but I didn’t see a video of it, so here’s mine.
Prog 1 moves a crate forward three columns, stopping along the way, then returns to the start and repeats. The first three iterations will move the first pile, the fourth will move the last crate into place.
Hi, great game!
I found a new solution for the “Multi Sort” with 7 registers:
Function 1: Call function 2, Call function 1
Function 2: Move down, Move right, If none call function 2, If blue move down, Move left
Sorry I cannot upload my solution to youtube, I do not own or want an account
CU Jegge
Here is the link to my solution for vertical sort: http://www.youtube.com/watch?v=J-eRQjYPPa4
Thanks ruilov for adding me to the list.
Double sort, 9 regs
@achrenico, good job. Can that solution be adapted to multi sort as well?
I solved the inverter puzzle using only ten slots. My solution is here:
http://www.youtube.com/watch?v=LwLXWv52v4A
but after posting on youtube, I found out that another guy with the user name Diametrix solved this before me… 
His post on youtube is here:
http://www.youtube.com/watch?v=4jIMmmG3d0I
I don’t know whether there are other solutions out there, so please don’t blame me for plagiarism…!!!
A complete Hackzors way for Mirror 2 in 7 Slots lol 
got to love recursion
http://www.youtube.com/watch?v=UlITA3wQEAY&list=PLBBCE3BB13BA62F15&index=25&feature=plpp_video
@nasapunk88, I can’t even understand what that’s doing! Can you explain? Good job!
@ruilov, Essentially the overall program is just taking every block and putting it in the last column. However, if we just move one cube at a time across the board and keep col 2 and col3 in a 1/2 ratio (2/3 when odd # blocks) it will end up looking like the answer and quit early. In order to do that we need to divide col2 in half everytime,moving the left over blocks to col3. col1 is just used as a temp location for col2 while it gets divided. Then just move 1 cube from col3 into col4 and you must move 1 back to col2 in order to keep col2 and col3 in correct ratio. That’s it. Repeat these steps and slowly the last column gets 1 block as col2 and col3 are constantly being reset to keep it in 1/2 ratio.
Hopefully that kind of makes sense lol.
kinda yeah, thanks. I’ve wanted to turn this level into a more general one for a while, eg starting at 5,4,3,2,1 and the goal being 1,2,3,4,5, but haven’t managed to find a solution.
oh and as to how its actually programmed, the setup is directly from Mirror, minus green cubes, which is just taking all boxes and moving them to the end like we want here; however we also want to be able to back travel and “reset” to col1. So just throw in recursion whenever you need to “reset” and while you unwrap the stack you move 1 cube back a slot each time.
ill take a look into seeing if i can code a program to test doing 5,4,3,2,1 (definitely won’t happen trying by hand; which is how I’ve worked out doing all the levels so far lol).
Can I claim prior discovery for the 7 register solution to Multi Sort, since my solution was published on twitter the day before Jegge posted it here? https://twitter.com/atrophic/statuses/195586521204658176
Congrats both on a nice solution but yes appears you posted first
Anyone got multi sort 2? No youtubes of it so far…
I think 17 regs on Multi Sort 2 and 16 regs on Restoring Order are hard to beat.