How do I minimize my game

I began my game with a sprite from web but its size was very big. So i enlarged game to protect sprite solubility. Normal layout is 1024 × 786 you know but in my game it is 6000 × 120000! So one background is 300 mb!.

Can ı minimize game with protecting solubility? Is there a way to make it easy?

https://www.scirra.com/blog/112/remembe ... our-memory

Rather than enlarging your game resolution, you may want to consider reducing the resolution of your image with an editor.

Generally speaking, you won't be able to use a large map all as one huge sprite. As described in the linked blog post, game developers will usually use a mixture of techniques to manage memory: tilemaps, repeating backgrounds, smart placement of transformed detail sprites, and the occasional big budget centerpiece.