Haha, reminds me of a Windows utility I wrote a looong time ago called Patch-A-Bobble:<p><a href="https://www.romhacking.net/utilities/142/" rel="nofollow">https://www.romhacking.net/utilities/142/</a><p>It was a win32 app that would read all the graphics from the Bubble Bobble ROM itself, then let you edit the levels, save them, and patch the modified levels back into the ROM so that you could play them on MAME (or even put them in an arcade cabinet).<p>edit: Oh, I actually uploaded it to github: <a href="https://github.com/kstenerud/patch-a-bobble">https://github.com/kstenerud/patch-a-bobble</a>