Is there any way I can make sprites from scratch or use any that aren’t copyrighted?
You utilize either of those options, neither being Corona SDK-dependent for answers. But, to get the ball rolling, there is a running thread discussing CC/PD-licensed game assets:
You utilize either of those options, neither being Corona SDK-dependent for answers. But, to get the ball rolling, there is a running thread discussing CC/PD-licensed game assets: