I must say - I love the controls implementation. I've always rather avoided joystick controlled adventure games because of the slow and cumbersome controls. But here, the controls are genius. As described in one of the comments below - the joystick movement is reduced to the minimum. But since the scheme is new, it needs a little bit of the time to get accustomed to - but once you get it, it plays great.
I'll keep that in mind. Another idea I have is to remove the exit slot in the inventory and instead use the scene boundaries to exit the inventory. This would create an additional inventory slot, and you could exit the inventory from half of the available slots. Of course all of this would only be implemented in future games.