Can i use spritekit without xcode ?

You need Xcode to create and build the SpriteKit project, but you can use Visual Studio Code to write the code. Select a Swift (or Objective-C if you're using that) file in the Finder, Get Info on the file, and tell the Finder to use Visual Studio Code as the default editor for Swift files. Double-clicking the Swift file in the Finder will open the file in Visual Studio Code. You can also select a Swift file in Xcode, right-click, and choose Open with External Editor.

If you have an iPad that can run iOS 15, another alternative is to use Swift Playgrounds 4 and create a SpriteKit app in that. Create a SpriteView to show a SpriteKit scene in a SwiftUI app, which is what Swift Playgrounds lets you create.