@cnoto Cool! I did something similar with the speakers in my cabinet, but I think yours turned out even better. The speaker covers were a good choice.
There are actually several MAME roms that are essentially video pinball machines. The coolest thing about them compared to console or PC pinball titles is that they actually prompt for coins (like any other arcade game) and keep real high-score lists (also like most other arcade games). Some are better than others, FYI. Time Scanner is pretty good, as is Pinball Action, Speed Ball and Grand Cross (which is really unique).