I'll create a basic implementation of a gacha game with idle game elements using React. We'll break this down into several components and utilities to manage different aspects of the game.

This implementation creates a basic gacha idle game with the following features:

1. Energy accumulation over time (1 point per second)
2. Gacha system for summoning characters and equipment
3. A simple battle system against randomly generated mobs
4. An inventory to display collected characters and equipment

The game includes idle game elements (automatic energy accumulation) and gacha elements (random character and equipment generation). Players can use their energy to summon characters and equipment, which increase their total power. They can then use this power to defeat mobs in the battle system.

You can further expand on this base by adding more features such as:

1. Character and equipment leveling systems
2. More diverse mobs and boss battles
3. Achievements and rewards
4. Different types of currencies or resources
5. Time-based events or daily quests

Feel free to ask if you want to expand on any specific part of the game or add new features!

I'll add more diverse mobs and boss battles, including ASCII art representations with color-coded rarity. Let's update our game to include these new features.

Let's start by updating our gameUtils.ts file to include new mob types and ASCII art:

These changes introduce the following new features to our gacha idle game:

1. More diverse mobs: We now have three types of mobs (Goblin, Skeleton, and Dragon), each with its own ASCII art representation.
2. Rarity system: Mobs now have four rarity levels (common, rare, epic, and legendary), each with a different color representation.
3. Boss battles: Every 5th battle will be against a boss, which is guaranteed to be either epic or legendary rarity.
4. Visual representation: The ASCII art for each mob is displayed in the battle system, colored according to its rarity.

The battle system now provides a more engaging visual experience with the ASCII art representations of the mobs. The color-coding based on rarity adds an extra layer of excitement to the battles, especially when encountering rare or boss mobs.

To further enhance this system, you could consider:

1. Adding special abilities or attacks for different mob types
2. Implementing a reward system based on the defeated mob's rarity
3. Creating a gallery or bestiary for players to track the different types of mobs they've encountered

Let me know if you'd like to expand on any of these ideas or if you have any other features you'd like to add to the game!