Thanks —! I'll try to make the game look even better as I progress.
Ah, JamesXXXYZ, I think what may have happened is that you got hit too many times and were destroyed. When your shields reach "0" the tank object gets destroyed and there's nothing for the camera to scroll to anymore, so it moves to the top left of the layout where the house is.
If that happens, just hit F5 to restart the test map. I hope that helps.
Thanks guys for checking it out so far!