Here's an example of a 2D game where you control a monkey trying to collect stolen bananas in a mountain. The game is playable on a smartphone and uses JavaScript with simple pictograms.
To play the game on a smartphone:
1. Copy the code into a new HTML file (e.g., `monkey_bananas.html`).
2. Open the file on your smartphone using a web browser.
3. Control the monkey's movement by swiping on the screen.
4. Try to move the monkey to collect the banana (yellow circle) by touching it.
5. Enjoy playing the game!