Here's an example of a simple game implementation in a single HTML file using JavaScript. Please note that this example does not include animations or 3D graphics, as adding those elements would require more complex code and resources.
Helicopter Battle
This game allows you to control a robot and fight against a helicopter. The helicopter's size and strength decrease as you attack it with different options: Laser, Missile, or EMP. You can choose your attack by clicking on the robot. Once the helicopter's size reaches or falls below 0, it will be defeated.