I bought the game a few minutes ago and I must say, it’s a good game (A.I. support or not) and I like it. It's also great, that some features are included, that are missing in the first Bubble Pop , like for example the various selectable aiming-lines or a 2-player mode. I also find the other stuff, with these planets etc interesting. Solid game. I do have some suggestions, maybe you are interested.
(1) Could the short aiming-line perhaps be designed a bit different. At the moment, it's only a very small dot and it would make the aiming easier, if this dot would be a bit bigger. I have two suggestions, how it could be designed:
In both examples, the point is bigger and this makes it easier to aim. Maybe the short aiming-line could be changed, or another selectable aiming-line (different dot) like this could be added?
(2) The idea for a two-player mode, where players take turns shooting, is an interesting feature. Even better, however, would be an additional two-player mode, where the play-areas of both players, are visible on the screen simultaneously, allowing players to compete directly against each other. I mean a classic "versus" mode, which continues, until one player’s bottom row is reached (much like in the official "Bust-a-Move (Puzzle Bobble)" games). Such a versus mode always is the most fun, in games like this, when you have friends at hand, playing against you.
(3) Absolutely perfect would be, to integrate CPU-players, against whom you can play in versus mode, as is the case in "Bust-a-Move 2" for example, because then you don’t need to have any friends on hand for playing. *lol* But I also know, that adding a strong CPU playing-mechanism is a hard thing, especially on a 8bit computer like the C64. But maybe, at least a 2-player versus mode for two human players, could be added?
And a final question. Would it be possible, to add this aiming-line selection-feature, also to your predecessor "Bubble Pop" game? That would be great, ideally including the new design for the short aiming line (one of these bigger dots). Cheers.