How do I give a cake to a customer? I can pick it up by clicking but then it disappears

I like the premise of the game and I look forward to trying it again in a week!

There seems to be some interesting ideas here, but I can't play this game at all. First it wouldn't load and I had to retry like 5 times before it worked. Then it did load but I couldn't make any coffee or give any items to the customers. Then I fell out the front door because there's no collision on it. I'm very glad that you're going to keep working on this game because I think this could be something good, but it's gonna take a lot of work. 
Honestly it was so broken that I don't think I can give this game a rating, as that would imply that this is in a somewhat finished state.