Sure! Here's a sample implementation of the game you described:
This is a simple game where you have four custom attacks to choose from: Punch, Kick, Fireball, and Ice Blast. Each attack inflicts different damage on the giant. You select the attack by tapping on different areas of the screen. The giant starts with a maximum health of 100, and you have to keep attacking it until its health reaches 0. Once the giant's health reaches 0, the game congratulates you for saving the Earth. The code is enclosed in the `
` tags and it can be directly run in a web browser as a single HTML file.