We have only two different movement speed levels in this game. If you want more depth in the game, you can add more layers that move at different speed levels.

Now we have only two lanes; the player is running either on the left or right lane. That makes the game a little boring. How about making the runway wider with four lanes?

Having a game score encourages the player to repeat the game to achieve a better score. It also adds competition between different players. We can create a game score that increases based on the timer, or how many obstacles the player can pass.

We have a variable to count how many rounds a user plays in the game. This can also be an indicator of how far away the player runs. How about using this indicator to design a scoring system?