I think what they mean by bad controls is that it's almost an instant reaction when you press the button. There is no build up of movement. When you're trying to control the pitch of the vehicle on a hill, one tap of the keys and you're upside down. You need to start off slowly turning up or down and buildup speed as you go. Other than that, what's with the dog? :P 2/5 for controls.
Really though, there aren't enough assortments of pieces to make more than 2 or 3 toys before your stopped... too many of the same pieces at once...etc