It's simply is a sign of status. It changes the image of your house to a more festive, better looking house. What is a nicer shirt doing besides wasting money? It's all about how you look! :)
Not sure what you mean, the mouse movement isn't dependent the cursor's location on the screen. But yeah, mouse steering ended up not being a very great way of controlling it as it turns out. Live and learn! Thanks for playing.
Would be nice to have like a countdown at the prerequisite creations.
What I don't like are the really huge tooltips which hide a lot of the screen. Can't you add an option to hide them?
Just...click mute button ;)