Tutorial for high score and

1- Hello, i would like some help, any tutorial for high score?i already have a global variable for score, how can i make an high score?
2- And any tutorial for making a boss fight?

Thanks in advance

there is nothing special about high score you have to use a global variable to preserve value between scenes.
What do you mean a boss tutorial?
You can use a variable with a value of 100 for example which is boss life, each time yoi hit him decrease until is 0

about the boss fight, trying to figure it out how to set up the events, for the boss animation etc.

I don’t know much about gdevelop but suppose you should chanhe animations and use timers