Sure! Here's an example of a JavaScript game where you fight against a growing and powerful helicopter. The game is designed to be played on a smartphone and uses pictograms for the game elements.
This implementation creates a canvas where the game is rendered. The robot and helicopter are represented as blue and red rectangles, respectively. The game starts with the robot and helicopter each having health points, attack power, and speed. The player can choose from a list of attacks and fight against the helicopter. The helicopter gets closer to the robot and increases in size with each turn. The game ends when either the robot's or helicopter's health reaches zero. Health bars are displayed to show the current health status.