Melon Machine: Mystery Game ~20

∞ lumber → → __

UNKNOWN COMMAND UWU

1 lumber → → 1 lumber

Your machine works!

Level 3:
1 lumber → → 2 planks
2 planks → → 1 lumber

Level 3.5:
1 lumber → → 4 rods
1 lumber → → 8 rods (1/2 size)
2 lumber → → 1 lumber (x2 size)