1st) Make global variable Highscore=0 = your in game highscore variable
Make Global variable Score=0 = your in game score variable
2nd) System - start of layout -localstorage- check for item "highscore" exist.
(highscore is the key I made up for this example but you can use anything)
3rd) Local storage-on item exist - Localstorage-set Highscore(global variable) to LocalStorage.ItemValue
4th) System - Score> Highscore - System-set Highscore to Score
-localstorage-set item "highscore" to Highscore
5th) System-every tick- set text to "Score:"&Score&"/Highscore:"&Highscore
Any questions feel free to ask just look at the capx file I included its a full game that actually is in the googleplay store now .