Sure! Here's an example of a simple game using JavaScript and HTML, with pictograms representing emojis and a dragon transformation feature:
In this game, the player controls the emoji's movement using the arrow keys. The emoji starts in the middle of the gameboard. Pressing the spacebar transforms the emoji into a dragon, and pressing it again transforms it back into an emoji.
Note: This is a simple example, and there is room for improvement to make it into a more engaging game.