I just noticed Steam has a function to show GPU usage during gameplay, and while testing my game, I noticed GPU usage is at 99%, whereas with most 2D games I own, it’s around 30%. I figured with everything going on, CPU usage would be high (lots of objects and collisions, but it’s only at 6%).
Edit: it looks to natively run on integrated graphics and doesn’t use the GPU. Even trying to get Nvidia to recognize the game and use the GPU it doesn’t work.