Bug: Obtain quest items early. (Day 1)
Replication: Run on mobile for the first time (clear cookies for the game if ran before), drag from the far right edge of your device's screen into the inventory.
Result: Depending on from where you drag, you can grab items like an amulet, scroll and other items from off screen into your inventory.
Notes: Potentially depends on the size of your device's screen. Mine is longer than the game screen is wide and as such reaches far enough beyond the screen that you're supposed to see. Maybe because of that I am able to grab items that are stored just by the side of it.