What is a Gaming or Game Engine?
A gaming engine is a software development environment, also referred to as a “game architecture” or “game framework,” with settings and configurations that optimize and simplify the development of video games across a variety of programming languages. A gaming engine may include a 2D or 3D graphics rendering engine that’s compatible with different import formats, a physics engine that simulates real-world activities, artificial intelligence (AI) that automatically responds to the player’s actions, a sound engine that controls sound effects, an animation engine, and a host of other feature.
Sounds like it is a game engine to me.