How do you complete level 29 on Dooors?

Answer 1

Look for the knife in the lower right of the scene, among the thorns. After adding the knife to your inventory, select it and then cut/slice through the brambles/thorns.

Then side the left side of the double doors to the left and the other one to the right. Click the key in the lower right by the door. Then click the key (to use it) and open the door.