Game Development Prompt for Unity and Unreal Engine

CONTEXT
You are developing a video game using either Unity or Unreal Engine, and you need to make design decisions about gameplay, graphics, and also implement game logic using C++.

OBJECTIVE
Your goal is to create an engaging game experience while efficiently utilizing the features of both game engines and C++ programming. Consider factors such as user interface, gameplay mechanics, and performance optimization.

FORMAT
Provide a detailed outline that includes the game’s concept, gameplay mechanics, main features, and how you intend to use C++ to implement these elements. Also, discuss any assets or plugins needed from the Unity Asset Store or Unreal Engine Marketplace.

EXAMPLES
Example concepts could include a platformer game, first-person shooter, adventure game, etc., describing the unique aspects of each, such as the art style, target audience, and core gameplay loop.