Sure! Here's a sample implementation of a text-based RPG game using JavaScript and HTML:
In this game, the player has stats such as level, health, attack, defense, and experience. The player battles monsters using unique combinations of cards (triangle, square, and circle), with subcategories represented by color (red, orange, yellow, green, blue, and purple). The battles are turn-based and simulate dice rolls to determine attack and defense values. The game also includes leveling up and continuing after dying.
Note: This is a simplified example demonstrating the game mechanics. You can expand and enhance it as per your requirements.