new to game editor but good in c language

Hi fellas I am new to game editor but I do know a good amount of C langauge. There are some problems I have with coding and hope someone can help.
1) How do you make a high score for your game?
2) How do you make multiple levels but in one file?
I have figured out a good deal but for some reason cant figure these out. Thank you kind sir if you can help me out.
1) How do you make a high score for your game?
2) How do you make multiple levels but in one file?
I have figured out a good deal but for some reason cant figure these out. Thank you kind sir if you can help me out.