Once Power Strike's theme begins to be heard from the Yamaha YM-2151, you will have to select one of its three modes (Regulation, Flash, and Triple Strike) by pressing the Select Button (or rolling the trackball up and down) then pressing the Set Button to confirm your choice; once you have done so, the ball will roll down the return lane on the left side of the alley and stop as a number "1" appears on the left side of the screen surrounded by spinning bowling pins. You shall then have to roll the trackball left and right to position the ball, and press the Select Button to cycle through the various types of shots: Straight Ball (default), Soft Hook (R), Medium Hook (R), Hard Hook (R), Hard Hook (L), Medium Hook (L) and Soft Hook (L), before rolling the trackball forward to send the ball towards the pins - and you'll receive one point for every pin you knock down. In Flash mode, you will receive 100-500 points for a spare and 400-800 for a strike (depending on which of the lights in front of the pins are turned on when you roll your ball over them); in Triple Strike mode, you get three shots per frame (as opposed to two) and will receive 100-300 points for a spare, as well as 300 per strike. At the start of each new frame, the appropriate number will be displayed on the left side of the screen surrounded by more spinning bowling pins or bowling balls - however, in the case of the fifth frame, two piles of money will appear, as the text "WHO'S BUYING" flashes up above the number "5". Once all players have finished the tenth frame, the text "GAME OVER" will appear on the alley, and the winner's score will turn red, as an arrow with the text "WINNER" upon it appears next to it (the word will also be heard from the HC-55516); if one or more of the players' scores were high enough they will get to enter their initials on the appropriate mode's high-score table (by rolling the trackball left and right, and pressing the Set Button). Once they have all done so, the game will go back into attract mode - and now it is time to move on to Pool Shark, which is not to be confused with Atari's 1977 game of Poolshark.