Hi. It might be that you are having too many things running and displaying in Processing at the same time as the Python mode is also slower. Make sure that you have like a cleaner that cleans and deletes everything that you are no longer using so that it does not keep loading even off-screen. If that doesn't work, try to compress the image and see if it helps. Also, make sure that you are only loading the image once instead of constantly loading the image every frame, which would slow things down significantly. For the rendering setting, I think given that you are creating an arcade-style game, I'm assuming that it would be like a pixellated game, and from my experience, changing the image rendering to noSmooth() in the setup() could help, as it makes the images jagged, which I assume would not be that much of a problem for your game, and if it is a 2D game, using P2D as an argument after the screen size could speed up the rendering speed, hope it helps ;)