Really a great game and good "Puyo Puyo" port, congratulation. I especially like, that playing against a CPU is possible, which is ideal when often no human player is available to play against. Only one thing i could not found out, or maybe it is not possible at all?
In higher levels against stronger CPU-opponents, when the gameplay becomes very fast, i find no way, to turn the pieces in the opposite direction. I was searching in the game-menue for an alternative keyboard-control, but seems like, this don't exist so far and the very most C64 controllers have only one button.
This is not ideal in this kind of games. Often i only lost against a CPU-opponent, because i had to press the Firebutton three times and the piece then don't turn thrice quickly enough. Turning one time to the other direction would have been the perfect solution here, but how to do so? Is this not possible? In all "Puyo Puyo" console-games, this is a very important factor in the gameplay.
For this C64 version of the game, i think, it should not be a big problem, to include a choosable keyboard-control as an alternative control-method in the game-menue. Not necessary to have a 2-button-controller then, because puzzle-games often can be played very good over keyboard and when turning pieces in both directions would be possible with this then, it would be a great improvement to the gameplay. Especially in the higher levels, when the player has nearly zero-time to position a falling piece in the perfect place.
Therefore i hope for a little update to this great game that allows turning the pieces in both directions, like it is in all the console "Puyo Puyo" ports.