I really liked this game! Well, I think I like this genre in general, if we can call it that. Managing your days while you solve minigames to complete subtasks always draws me in, especially if I like the theme, which I really did here.
I think at least two more types of minigames would been nice, even if something simple, unoriginal, just to increase variations. I quickly decided that I don't like welding, so I only did the circuits, which I really enjoyed all the way through, but I wonder what else could you come up with.
Also, 4 days is just not enough! :)