Sure, here is an example of a simple game where you can play as a leopard and transform into a puppy. The game is implemented as a single HTML file and uses JavaScript for the game logic. It is designed for smartphone operation and includes pictograms.
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To play the game, open the HTML file in a web browser on your smartphone. You will see a leopard pictogram displayed on the screen. Tap/click on the pictogram, and it will transform into a puppy pictogram. Tapping/clicking again will transform it back into a leopard. You can continue switching between the two forms by tapping/clicking on the screen.
Please note that this is a basic example and can be further enhanced with additional game mechanics, scoring, levels, and more.