Once you remove all the keys and have just the two opposite corners left. I read where you can click on the yellow guy and then click on the other corner. All in one move. Hope that helps you. Your game appears the same as mine.
Jasbo 3260 I read above how to clear 3933. Clear all the vaults and keys leaving on the frog and the one vault in the upper left corner. Once you have done that. Click on the frog and then click on the locked vault in the left corner. I didn't know this and would have never new.