Let's go ahead and test the game for the first time. We haven't set up all the physics yet, but let's just see where we're at. Once you click on the Preview button (at the top-right of Buildbox), you'll see this screen:
Remember how we have the Game Mind Map laid out? This is the current state of our Main Menu UI. Click on Start, and you'll be taken to the screen below and left (the Worlds UI), and finally, when you click on 1 (for world number 1), you'll be taken to Mars and can play (the screen to the lower-right). Play with it, and then we'll move on.
Until we get to making our UI screens look better, we don't want to have to go through all of these menus every time we make a tiny adjustment. So, let's adjust our Game Mind Map so that when we hit our Preview button, it takes us straight to the area we're testing. Go ahead and open the Game Mind Map.
What we need is to literally skip-over our Menu UI and Worlds UI and go straight...