I'm new and trying to a a score system for my game.

I'm making a simple chrome dino game and want to save the high score so when the player dies it will check if the current score is higher than the high score and if so then make that the new high score. This is probably really easy but just can't seam to find anything about how to do it. This is the game: https://microstudio.dev/i/Exceptional3D/chromedino/

https://sites.google.com/ed.act.edu.au/games-programming/game-elements/score This is good example. Also if you go to Game Elements you will find many useful tutorials