The solution codes show the directional keys (or spacebar when Block is split).
R = right button (number of times)
L = left button
U = Up button
D = Down button
S = spacebar (toggles halves that move separately)
R ,U, R3, U, L, D, R, U2, R3, D3, R, U
Level 3 R,U,R3,U,L,D,R,U2,R3,D3,R,U
Level 10 R2,L,D3,R,D5,L4,U,L3,D,U,R3,D,R3,U,space,R2,D3,R,D3,L,D,U,R,U3,L,U2,R,space,R2,L7
To beat Level 8: R2,D3,R2,S,U3,R2 (R - right, L - left, U - up, D - down, S - spacebar). To enter stage 8 the passcode is 499707.
Level 20 (S=spacebar) D,L,D,R,D,L,U2,R,U2,L4,D2,R,U,L2,D3,L,D,U,R,U2,R,U2,R3,D3,L,U,S,L,U,D,R,S,L5, D5,R5,D
It was supposed to say D3 R2 which is the first translation sequence, moving "down 3, right 2" (see the related solution).
The S means "spacebar" which controls the two separate blocks when the large block splits.
In solutions, S stands for spacebar, which lets you select one half of a split Block to move.
There are many YouTube solutions under "Bloxorz level (whatever)" but there is a site with all of them at the related link below.
R ,U, R3, U, L, D, R, U2, R3, D3, R, U
Level 3 R,U,R3,U,L,D,R,U2,R3,D3,R,U
Bloxorz uses the 4 "arrow" (directional keys), to move Right, Left, Up, or Down, and the spacebar (indicated by an S in solutions) to toggle halves of the block.
Level 10 R2,L,D3,R,D5,L4,U,L3,D,U,R3,D,R3,U,space,R2,D3,R,D3,L,D,U,R,U3,L,U2,R,space,R2,L7
Press the spacebar. This is indicated by (space) or by "S" in the solutions.
There are only 33 levels (stages) on Bloxorz.
Level 27 R5,U,L,D,R,U,R,D,L6,U,R,D,L2,U,R,D,R4,U,R4,D3,L,D3,L3,D,L,U4,R,D,L7,U,L,D2,R, U,L,D,R,U,L
When you play Bloxorz you will see passcodes that let you skip to that level if you want to play it again to improve your score.