Very interesting concept! Aiming seems off though - would have expected arch out from the middle of the slingshot, but it curves left. As is, it's a bit impossible to predict where the shot will land. Ammo is also a bit too limited - I ended up with 3-4 stones, as the rest rolled through the floor or under assets and were impossible to find again.
Definitely a cool concept, and it's a very pretty game. Enjoyed the first person perspective!