Click or tap a cube to walk there. You can hop up one cube, and drop down as far as you like.
Rotate
Right-click, or press Rotate 90°. Turning the tower lines up bridges that do not exist from any other angle.
Collect
Step on M, then D, then W to build a streak. Every set you complete multiplies what the climb is worth.
The catch
A letter only counts while you can actually see it. Rotate to bring hidden letters into view — that is where the long combos come from.
One life
Step on the wrong letter and the combo breaks: the tower comes apart and you fall to the first cube of a new one. One mistake, one fresh run — your best score and best streak are kept.
Climb
Get as high as you can, and go back down whenever it opens a better route. Steps is how high you have reached.