Sure! Here's an example implementation of a sci-fi RPG with leveling up stats, battles, secrets, and NPC dialogue. Note that this is a simplified version and you can expand upon it to add more features and details.
In this example, the game starts by calling the `startGame()` function, which provides an introduction and explains how to interact with the game. The player's stats (attack, wisdom, and charisma) are stored in the `player` object and can be increased by winning battles, finding secrets, and talking to NPCs.
You can call different functions (`battle()`, `findSecret()`, `talkToNPC()`) to play the game. The implementation provided here simply logs game events and messages to the console for demonstration purposes. You can enhance the game by adding a graphical user interface (GUI), more quests, a story, and other game mechanics as per your requirements.