Cool game, the puzzles were all pretty good, and the music and backgrounds were really nice. Overall this was a pretty good experience.
I would say that the scales need a bit of grease, they're pretty rusty and don't move too well, and I almost failed the 3rd level because I couldn't get it to go flat (even on both sides). Also, the puzzles were a bit unclear, what is the end goal? From what I could tell it was to get an even amount of blocks on either side and then get the scales flat. But, it could be anything: get the scales flat regardless of weight, get an even weight regardless of if the scale is flat, get all the blocks on there. If it's the second one then can I just pull the blocks off and it'll be even? Just a thought for the puzzle one, but a simple level at the start that clearly defines the objective would help. Also the timer's broken, the more you restart a level the faster it goes, until it's impossible to solve the level in the time limit, not too hard to get around, but thought you should know.
Other than those, though, it's a good game, keep up the good work and I'm looking forward to what you make in the future!