Real-time synth integration with experimental 2d game engine

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I am building an experimental game engine using examples for inspiration on code style and project structure. I attempted to make an interesting game with Unity and Pd not too long ago, but have become more satisfied with developing my own engine for the purposes of practice. Based on the structure of the header files I have right now, how would you recommend I structure integrating a wavetable synth + sequencer into my engine for general use? https://github.com/WillRaezer/Str4tR4z0rGameEngine/tree/master/GameEngine