The main goal in 100 Doors is to escape the room. Using all the possibilities of the device you need to open each of 100 doors and move the doors to the next Level.
Search for hidden objects, solve puzzles and use an items to do this!
Solution :
Take the brush on the floor and clear the glass of the door. clean until brush disappear from your inventory.
Shake your device ant take the pick axe and tap the glass you brushed. Take 2 broken pieces from the glass.
Tap the glass in your inventory and tap the left stone to reflect the light.
Tap the glass in your inventory and tap the right stone to reflect the light in the stairs.