Sure! Here's an example of a simple platformer game in a single HTML file, using JavaScript and pictograms:
In this game, you control a hockey mask (player) and have to kill enemies with a machete. The player can move up and down using the arrow keys and throw the machete using the space key. Once thrown, the machete moves towards the enemy, and if it hits the enemy, it is killed. The enemy moves towards the player, and you win the game if you kill the enemy before it reaches you.