We have two games, so there will be two Play buttons in the menu. The Play button opens the level selection screen. Each game has its own separate levels
Game 1
When you press the screen, the ball bounces. Spikes appear periodically on the left and right. If you touch it, you lose. After a couple seconds the spikes disappear and new ones appear elsewhere. Levels may vary in time.
Game 2
When you touch the screen, the ball bounces. Periodically spikes fall from above. If the ball touches a spike - lost. It is necessary to live a certain number of seconds. The number of seconds increases with each level.