How to Beat Level 15 on 100 floors

I think we can solve the game quite easy until level 14, and if you stuck, this is how to beat level 15 on 100 floors and it's continued until level 30. how about level 31? for now the game offers only 30 levels. we are waiting for the update from the developer.

how to beat level 15 on 100 floors

Well for level 15 answer is 1643. this is the code you have to key in, simply push the number 1 then 6 then 4 then 3

how to solve level 16 on 100 floors
what you have to do is loosening 4 screws, first pick up the screw driver then touch/slide the screw for loosening it until all 4 screws removed. then tilt or flip your iPad/iPhone until the door open

how do you beat level 17 on 100 floors
this is quite complicated. you will see the ball, roll it to the left till pushing the button 1x, roll again the ball but to the right then push button 2x, then roll again to left and push button 3x finally roll again the ball to right and push button 2x. you will see the green arrow and move to next level. next in solution for :

floor 15 100 floors

100 floors level 18
you have to tap 5 times to 5 buttons very fast with sequence like this
1 bottom left
2 middle right
3 midle left
4 top right
5 top left
that's for how to beat level 15 on 100 floors