Ermmm no... there are levels that are clearly intended to have objectives you complete. Beyond that, yes it's a sandbox. But why have even the goals for beating each level if you aren't actually remotely challenged because the win condition is broken and gives you the pass when you "sort of kind of" beat it extremely sloppily, or get a win while your vehicle has already fallen apart?

 

Yup I saw this too. Glad I saw this before posting the bug. Basically it looks like in addition to returning to the main menu, the "Main Menu" button also inadvertently resets the window x/y position.