'Let's climb quickly' should also probably be an accepted response
"Let's climb quickly." is now accepted. However, please keep in mind that 등산하다 is to climb a mountain, not just anything.
so why is often "hike" the expected answer?
can this mean let's go hiking soon? because let's go climbing quickly just sounds weird
Let's climb quickly ok
Cuz climb is a verb
Your answer incorrectly required a space after the ' and before the s
whats wrong with "lets quickly go climbing"?