This is the Retrobooster Demo 0.6-1 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.
Installation instructions:
> yum install --nogpgcheck retrobooster-demo-0.6-1.i686.rpm
> retrobooster-demo
Or go to Applications->Games->Retrobooster Demo