SemiCom's unofficial 1997 Pac-Man arcade game Twinkle is divided into fifty stages (however, the last ten can only be accessed if either Pac-Man eats the Ice Cylinder on the fortieth one, because if they do not, the game will end after it); once you have inserted your coin(s) into the cabinet, and pressed one (or both) of the Start Buttons, the letters S, T, A, G, and E and the number 1 will spiral down and up into view from the top and bottom of the screen letter-by-letter. The first ten stages' main theme shall then start to be heard from the Yamaha YM-2151, as one (or both) of those Pac-Mans materializes in his starting position, and the three purple ghosts start chasing him (or them) around the maze - and like Hyper Pac-Man, when either Pac-Man eats a power pellet, the game's "invincibility" theme will start to be heard from the Yamaha YM-2151, but the ghosts will turn orange instead of blue. Once they have been eaten, they will regenerate in their original starting positions shortly after (and, if the power pellet is still effective, they will still be edible); like in the official Pac-Man title Pac-Mania, which also used a Yamaha YM-2151, the ghosts will flash in their original colour when the pellet is about to wear off but the "invincibility" theme will also increase in tempo. Once the Pac-Mans have eaten all the regular pellets between them (they do not have to eat all the bonus items, or all the power pellets), the text "STAGE CLEAR" will spiral down and up into view from the top and bottom of the screen letter-by-letter while the game's "stage clear" theme is heard from the OKI MSM-6295; however, when the time for the current stage is down to ten seconds, the song that you are hearing from the Yamaha YM-2151 will increase in tempo, and if you cannot eat all the remaining regular pellets between you before it runs out, the text "TIME OVER" will spiral down and up into view from the top and bottom of the screen letter-by-letter as the game's "time up" theme is heard from the OKI MSM-6295 (this will also, again, cost both of the Pac-Mans a life, or the game if they both only had one life remaining, as well as the effects of any special items they may have collected). You must also remember, that unlike in the official Pac-Man games (and the aforementioned Hyper Pac-Man), letting go of the joystick will cause your Pac-Man to stop moving - and as the game progresses, nine additional types of enemies will be introduced (but they, much like the unnamed identikit ghosts, all seem to behave identically, and make it look more like a freeware Windows game).