How do you complete level 24 on Dooors?

Use the fire in your tools to light the two torches next to the frozen door.

Then look at the drawing on the wall which gives us a clue about how to pull the handles.

Starting from the right, pull the rightmost handle, then continue down the line to the left one, then back all the way right again.

All handles should have been pulled twice by the end except for the leftmost one.

This should turn off the cold air coming in from the top, allowing the ice around the door to melt. Once the ice is melted, you can open the door.