Balancing the weight of the left platform with the right, it can beat a level 75.
Take a small piece of metal on the right platform and store supplies. Then move the 3 iron in the floor to the right of the platform and move the little metal from your inventory to the left of the platform, so it will be balanced and the right red button will turn green, to change the color of the left red button you tilt your phone to the left.
At level 76 you have to shift the wooden boxes in the door so that the black lines forming a square, and then save the wooden box that is in stock right into the middle of the door. Here's the explanation:
Now the explanation to beat level 77.
Press the green button 4 times which is right next door, the lights lit up all the way down, then press 2 times the lamp was burning at the bottom.
Now continue to the 100 floors level 78 explanation, or back to the 100 floors level 74 explanation