Want to only save Highscore

Hello everyone, this is my first post. I just created and release a game to Google Play.

play.google.com/store/apps/details

Everytime the app closes is clears out the app, HighScore goes back to 0. I don't want to save the whole game state, just the HighScore variable. Is there a way to store just High Score, and just load that variable on game load?

Thank you in advance,

2Crafted Studios

2craftedstudios.com

Thank you. I'm currently at work, but will try that when I get home

That code worked perfectly. Thank you so much. Will be in next game update