Content of the game:
A hit the tank
GF racing car
H I bricks
K frog across the river
N O Variable Tetris
The PORSTUVWXYZ is all about moving the Tetris (the bricks stacked below are moving from left to right, making the game more difficult).
RESET reset key to restore the game to its initial state.
SOUND voice switch
PAUSE/START pause / continue key
ON/OFF open key
UP DOWN: It's hard to adjust the game by pressing up or down 1-99 (in the middle of the screen) before the game starts.