Finally, migrated the game to OpenGL, in the process I created a single header small rendering library for easily getting a project up and running in OpenGL instead of the limited SDL renderer. it uses a couple of stb libraries, and a personal math library I made.
It offers streamlined sprite loading and packing, render layers, custom shaders, a text renderer with simple functions, load, and render. It utilizes immediate mode, and has two basic pipelines for basic shapes and textured quads.
The goal is ease of use, with modularity, and since I always start with SDL2 to get an idea up and running and then struggle with the migration (with migranes) this is a solution.
Particularly proud of this one, here it is: https://github.com/Wassimulator/SimplyRend &av-racer