hey sorry for the late reply, i have put in the description how to pass every level
but to sum it, you need to punch the boxes in the correct order, if you stand on a box and call it will either give you green flash or a red flash, use this to find out the combination of the boxes to trigger to open the door (this part was probably the worst designed part of the game, i had to rush out the levels so i couldnt really focus on the clarity that much, sorry!)