The game should run just fine on any version of Windows 10, whether 32- or 64-bit. I downloaded the game from the source and it passed my browser’s security check and a virus scan. Extract and install the file onto your computer.
Here’s how to get 3D Pinball running on your Windows 10 machine: This is a dumb decision for multiple reasons, the most obvious of which is “oh no, the game written twenty years ago won’t run at top speed on my computer that is a hundred times faster than the one the game was designed for? However shall I continue to live?” There was also apparently a ‘collision detection bug’ but it doesn’t seem to be an actual problem in play. The original game was dropped partly because Microsoft decided to stop including games in the operating system, but also because it wasn’t optimized for 64-bit computers. Play 3D Pinball Space Cadet in Windows 10