This is the best I've seen so far. Really clever concept with brilliant puzzle design. I surrendered at the second bonus level (after bruteforcing my way into the first one, I imagine there was another way to solve it rather than mashing my mouse) but it really got me hooked. With the amount of polish I can easily see this as a full game with a few more levels. The only minor thing that could use some improvement is when the scale is squashed and it glitches a bit. Very well done!