Well that's just sad. Pinball was dropped because of incompetent programmers. Don't 32-bit binaries work on 64-bit anyways?
It could have been converted to 64-bit, but they didn't have the time.
"That would have been even more work, because there was at the time no infrastructure in Setup for having 32-bit-only components. (And then automatically uninstalling it when WOW64 was disabled.) ..."