There is an open source version of this game called Domino-Chain, where the levels from the original Push-Over game here on GOG can be copied to Domino-Chain as described in the menu.

After a little editing I've adjusted some texture maps from the free PortableApps version of Push-Over to work in Domino-Chain, since the texture maps included with the Domino-Chain open source version are pretty bare.

Make sure to rename the files to the correct names after downloading.

Place the following in data\domino-chain\images
figure.png

And place the following in data\domino-chain\themes
castle.png
greek.png
japanese.png

Let me know if there are any graphical glitches.

Thanks! Amazing timing, by the way: I just discovered and played around with domino-chain yesterday. Too bad I can't get full-screen to work (it crashes or resizes the image without resizing the window), but it's nice not to have to sit through the animations of the real game, or to have to write down access codes. Plus I can just skip ones I'm not patient enough to solve right away. Maybe an occasional animation would be fun to watch, too. I wonder how hard they are to extract.

I don't know about extracting, the video would probably have to be recorded and converted to a format that works with the updated engine, if it even has hooks to load video files.

There is a small physics change, though, that affects one of the levels, dominoes no longer count as toppled if they rest up against stairs, which changes the solution of puzzle 64.