I'm making a game and I would like to utilize pixel art as my style. But I faced a problem, modern displays on my target platform (iOS) have extremely high resolution. So if my artist makes me some sprites in 1 to 1 pixel resolution, each character sprite will look like 2x3 millimeters, and that's not what I want.
How do I fix this problem? Do i just use 4 pixel blocks as 1 pixel in my art, or there is some other way?
Another question, is how do I utilize high-crisp display of those devices with pixel art?
How do I go with using images on older devices? Do I have to make double assets or downscale/upscale some images?