Sure, here's an example of a 3D cube game in a single HTML file using JavaScript. This game features a cube that the player controls, and there are spikes that follow and kill the player if they get too close:
In this game, the player controls a blue cube using the arrow keys on their smartphone. The spikes, represented by red squares, continuously fall from the top of the game area towards the player. If a spike collides with the player's cube, the game ends and the player is prompted with a game over message.
Please note that due to the limitations of text-based communication, the actual game performance may vary. You can copy the above code into a text file with a `.html` extension and open it in a web browser on your smartphone to play the game.