I think I broke one thing while fixing another. Rocket Duel v 0.63 is another bugfix update. The Mars Rocket playfields now work as intended. Also, if nobody change my mind, this will be the last Rocket Duel version to support DOS and six year old computers. I plan to make the next version a bit more techincally advanced and with many changes to make it both look better and play better… But for now, enjoy Rocket Duel 0.63 – a (AFAIK) bugfree game!