One great thing about this game is that you're your own enemy, because you can do so much at a time that you end up messing yourself up. Great concept!
I wish it was easier to grasp the mechanics at first with an in game hud based tutorial (arrows showing where to clicks for the first run for example).
Losing the game when the bread falls feels to punitive, it's enough that you're loosing time by doing so IMO. And being able to "repaint" a bread from one color to the other feels incorrect, if this was intended by design, I find it a bad way to introduce difficulty.
This mix of keyboard and mouse remembers me surgeon simulator, which I love.
Good job !