There are 21 moves:
right down left up right
down left up up up
up up right right right
down right right down right
down
or
R D L U R D L
U5 R3 D R2 D R D
Level 19 (15 moves) R, D, R, D, R, D, L, U2, L, U, R, D, R, D
Level 18 (36 moves) D3, R, D2, L, U4, L, D, R, U, L, U, R, D2, L, U, R5, D3, L, D2, L, D, L
fug
quit
you connect everything to the <3 dude
Level 16 (24 moves) D, R, D6, L, U2, L, D, L2, U5, R3, U
Level 13 (26 moves) L, U, R4, D4, L, U, R, U4, L, D, R, D5, L
Level 19 (15 moves) R, D, R, D, R, D, L, U2, L, U, R, D, R, D
The quickest solution is 6 moves: down, left, up, up, left, down. D L U2, L D
Level 17 (20 moves) D, R, U, L, D3, R, U3, L2, D, R, U, L, D, R, D
There are no level codes. You can select any level that you have already played as your starting point.
Level 12 (21 moves) (official video shows 23, silver) D, R, U, R, D, L, U, R, D6, L3, U, R, D, L
you beat it
Level 18 (36 moves) D3, R, D2, L, U4, L, D, R, U, L, U, R, D2, L, U, R5, D3, L, D2, L, D, L
how do you beat level 10 on factory balls 4
You beat it.
imposible