Perserve Image quality?

Hey fellas, I'm trying to make 2D kitchen lvl, so when i make and draw those elements, ofc everything looks good from afar, but when i zoom in and transfer it on my mobile everything loses quality, so what is best way to use things like those, make every image and element in 1080 p, which will consume more space and memory? Or is there any other way to deal with it instead of image resize.Oh and also i use PS CC. Thank you lads!