Visually outstanding! Aesthetically, it was polished like a diamond and I'm blown away by the visuals you where able to pull off here.
Everyone has pointed out the bugs, so I won't harp on those too much. But, from the taste I got of the actual gameplay during the tutorial felt very clean and easy to understand. I'd suggest dropping the barrels oriented vertically with a locked rotation facing the player so that they can quickly decide which barrel is the one they're looking for.
Also, did you know that pressing Spacebar deletes the barrel the player is carrying? This could be an interesting extra mechanic if you got some kind of credit for properly cleaning up the extra barrels that keep accumulating.