Nice game! The art is wonderful, and the gameplay was fun and satisfying once I figured out how it worked.
It unfortunately took me a while to figure out that the robot arm was purely decorative (I mean, that it mattered where I clicked rather than where the end of the arm was). I feel like it would help to have the end of the arm track the mouse's position more exactly. Also some auditory feedback on picking up / dropping things would help, since it took me a bit to figure out that I needed to click and hold instead of just clicking once to pick up and once to drop.