Sure! Here's a simple tower platformer game implemented as a single HTML file using JavaScript:
In this game, the player (represented by a blue square) must navigate up a tower by jumping on the green platforms. The player moves automatically downwards due to gravity, but can jump by pressing a key or touching the screen on a smartphone. The game checks for collisions between the player and the platforms to handle jumping and landing mechanics.
This is a basic implementation of a tower platformer game using JavaScript and HTML. You can customize and expand on it further according to your specific requirements.