This is amazing - have been trying it for hours already. :) Is it possible to have it as a 64x64 as well, or is it possible to save the 32x32 in a 64x64 size?
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Most retro games tend to just upscale the entire game without any interpolation, such as x2 or x3 pixels per pixel. Additionally you can add an interlacing and blur effect on the screen to make it look smoother. I did it in Surgevania