I really liked the crafting. The fact that you could combine things however you want was really cool!
I lost the first time on the second customer. Second playthrough I realized I couldn't really lost once I had some money. Where I was clicking was a bit iffy, so I just clicked a lot. Some crafting sounds would have added a lot to the experience. Being able to buy scrap with money would have been good too.
This is a really neat minigame, and would make a great full game with some expansion.