From the Wikipedia of the game in the picture from OP:

For the first three levels, there is a row of three blocks which move side-to-side on the LED display. When the player presses the start/stop button, the row of blocks stop moving. Then, another row of blocks appear above the previous row, moving faster than the one before it. Blocks that do not align directly above the previous set are removed. If the player misses completely, the game is over. The number of blocks is automatically reduced to two at level four, then one at level 10. The goal is to consistently get the blocks directly above the previous set, stacking them to the minor prize and ultimately the major prize level.

Edit: found a gameplay video https://youtu.be/tM2RisbrdqI