Nice little game. I liked the special mechanic of moving the player to then move the mouse. However, it does feel a bit cumbersome, but as this is the main game idea, I think it is fine. I would reduce the size of the hitboxes for the barrels (and also the mouse). Visually it sometime looked like you would fit through a gap, but then you were blocked by "invisible" walls. This is for example the case in the first level on the left middle.
Congrats to your game!