Resize from 4-inch to 3.5 using Sprite Kit

I'm doing my first iOs game using Sprite Kit and Swift. I start positioning all my Sprites and labels like:

sprite.position = CGPoint(x: 0, y: 200)

when i run in a 4-inch device, it looks really good but when i run it in a 3.5 device the game looks incomplete.

¿Is there any good solutions to resize all the layers instead of redesign all my scenes?