Speed, repair, production. I couldn't quite figure out what these upgrades do. Does it upgrade the machinery or the robot?
Overall, fun race-against-the-clock game!
Another note:
One funny peeve that I have in games (this is not a criticism of your game), for example, in an RPG the game graphics show a giant pile of treasure with gold and jewels and swords and armour, but when you click it, you get... 100 gold, only. So, in your game, when the factory machine breaks down, I can see a box sitting on the conveyor belt. I want that box! lol.