This is the Retrobooster Demo 0.7.8-1 for Linux in an .rpm package.
This package contains a 32-bit game that will work on 32-bit or 64-bit versions of Linux. The game may fail or behave poorly on 64-bit Linux if you have not yet installed 32-bit compatibility packages for your video or audio backends.
> yum install --nogpgcheck retrobooster-demo-0.7.5-1.i686.rpm
Or go to Applications->Games->Retrobooster Demo