You have to use the analog stick
You cannot.
If your in create mode undo but if your in play you cant unless you attach a button to a emitter then click emit your creature so every time you hit the button a new creature will spawn regardless whether you killed the old one
use an emitter
you cant
That depends on the exact model/make of car.
With a scoreboard
Make a good level
Make a really good level
Make a good level
Because you can make your own levels
Use options to make it a favorite
You just go to create mode and make anything