Sure! Here's an example of a simple game that meets your requirements:
In this game, you control a blue square (representing the player) using the arrow keys on your smartphone. The player can jump by pressing the up arrow key, move left and right using the left and right arrow keys, respectively.
The game includes some ground blocks represented by gray squares, enemy blocks represented by red squares, and a switch bar represented by a yellow horizontal bar.
Please note that this example only includes the basic movement functionality and the visual representation of the game elements. Additional code for collision detection, scoring, and game logic would need to be added based on your specific requirements.