Hy J5. Great to see, you showcasing more new C64 games alongside your billiard title. Good new games are always welcome on the C64 and this game is a nice one. I played it today for about one hour and like it. As a long-time player of "Bust-a-Move (Puzzle Bobble)" titles and alot of their clones on different systems (consoles, handhelds, computers), I have a few thoughts on "Bubble Pop" as well, maybe you are interested to hear?
(1) it would be great, to have an option, allowing experienced "Bust-a-Move" players to turn off this current full aiming-line, since this puzzler is also based on, that players sometimes miss the exact target, when they shoot. The current aiming-line is good for beginners, but with this line, you can never miss a target, because this line always shows you, where the ball lands in the end. Therefore it would be nice, to have an additional gaming-mode with just a short (few centimeters) straight aiming-line, which still allows the players, to miss, like it's the case in the original "Bust-a-Move" games from Taito. This other aiming-line could be selected in the "options" of the game, for example.
(2) a simultaneous two-player mode (head-to-head) would be fantastic. Then the game can be played against friends. Not sure, if this could be integrated in this game, because it would need alot of additional code? If not, maybe a "Bubble Pop 2" game could follow in the future?
(3) and a mode against a CPU-opponent would be even better and totally superb, as it would allow for solo play against an opponent all the time (because not always human friends are around). After all, the "Bust-a-Move" games and their clones are most fun, when played against skilled opponents (whether humans or CPU), because playing the levels is interesting in the beginning, but a time later, you know all levels, then it's alot more interesting, to play head-to-head, with passing pieces over to the other person, until one of the players runs out.
Best regards and go on making games for C64!