[quote]1=> The problem is, I want to stop scores when Health=0 and I want to see them in "high scores"[/quote]
For the collision event, make a second condition checking if health > 0. So if health is 0 or less, it won't add any score.
[quote]2=> How to make a new room for menu and add buttons like start, view high score etc Plz help[/quote]
Make a new room and display these things like you did for the score except maybe do it just once on load. Use global variables to keep high scores.