Just remember... It's never too late and nothing is permanent, especially with computers!
For example... I remember RedHat having a Jezz Ball knockoff... forget what it's called now... among plenty of other good "cheezy" games. You could consider a "free" upgrade to Linux.
If not, XP64 and Vista64 are "supposed" to run 32bit apps. It's called WOW, or "Windows on Windows." Something M$ has done since the Windows9x days to run 16bit apps on a 32bit system. Problem is... it doesn't always work. Not that programs won't install or run, they just seem to deteriorate much quicker than normal because the system is literally emulating another OS. Mac does the same thing with Soft Windows or whatever they call it nowadays.
Now, what you want, is to run a 16bit app (Jezz Ball) in a 64 bit world... good luck with that. Your next best solution is to install both Vista64 and XP on your system in a multi-boot fashion. I would highly recommend putting them on separate partitions, just because of the funky directory names the 64 bit versions use and the file system structure makes things quite incompatible between 32 and 64 bit. But with this, you can boot your system to your desired OS... Vista for work, and XP for play. It's not as complicated as it sounds, the Windows installation/setup has recognized this configuration for years and can help you along.
Ken