If I woke up tomorrow and was assigned the role of Man In Charge for this game, I'd institute three changes:
-No more timer. It stresses me out. At least optional, or only in certain situations.
-The items must weigh if you can stack them in any way on the scale, not just if they touch the scale. Because gravity. Wacky, precarious piles are also probably more fun. It also lets you taunt the player with absurdly small scales.
-I'd give the player the ability to easily rotate items too, that should make things more feasible overall
But those are just some ideas of mine. I liked your game. I like its graphical style, the cozy palette and its sense of whimsy. A good implementation of the theme, achieved without any major hiccups. Nicely done.