That sounds great, thanks for that. Looking forward to an updated version in the future. At least a 2-player mode, in which the user can play against a human friend, would be great to have.
Even better of course would be, when CPU-players could be chosen too, because often you don't have a human friend within reach, when you want to play *LOL*. But i can imagine, that it might can get problematic, to add a good playing A.I. here on the C64, because "Dr. Mario" is a complex game, when an A.I. should play it really well. On the N64 for example, i have played the game so often and improved, that i now can compete against the A.I, when they is on level "superhard" and on "fast" for the falling-pieces speed.
The N64 then really plays very good, don't know, if something like that is possible on the C64 too, because the N64-console is two generations ahead in technical terms, but it would be fantastic. :) There is a "Puyo Puyo" clone on the C64 named "Oy Up" and there the player can compete against CPU-players and they play pretty well in the higher levels, but "Puyo Puyo" is not as complex as "Dr. Mario", when it should be played really good from an A.I.