Really well done! Fantastic art style, creative idea, and the game worked very well. It's also well balanced: it took me some tinkering to figure out the puzzles, which is good, but they were fair. When I saw the mention of a second ending, I of course had to go back and play a second time. Great work!
[Play the game before reading on]: Only very minor snag I had was that the first time I played, I had tinkered with the crane and had left it slightly off the ground; when I then pushed the battery all the way to the right (flush with crane), I could no longer access the plug for operating the crane (blocked by battery), nor could I push the battery back to the left, away from the crane, so I was just stuck and had to reset the game.
That was a minor issue and not likely to be experienced by many players -- nice job on this game!