No, use the key on the door XD
Throw the key at the jar. Breaking it open.
Look under the pillow on the bed
Carefully pick up the Hippo and throw it at the door.
Arg, this guy is heavy.
Actually, use the acid to make a hole in the door, and place the keyhole in the exact spot.
Put the freakin key in the keyhole on the bed. Geez.