Section - Climbing
Understand "climb" or "climb higher" or "ascend" or "scale" as vaguely petter-climbing when the location is a petter-room. Vaguely petter-climbing is an action applying to nothing.
Instead of vaguely petter-climbing:
try climbing the petter-tree.
Understand "climb [direction]" as going when the location is a petter-room.
Instead of climbing the petter-tree when the location is on-petter-tree:
try going up.