(adsbygoogle = window.adsbygoogle || []).push({}); Hi ngu, this is a very simple tutorial to change records and other stuff of this endless running game...
1 download iFile
2 go to applications and search the game
3 open documents and then Sforces_Run_Forrest_Run_SGSF.json with the text viewer
At the bottom of the text you will see "max score" followed by your score, "miles" and "multiplier"... You can change the numbers as you want
For example my data is
0,0,0],"actualCharacterID":9,"maxScore":1000000,"miles":1000000,"version":1,"multiplier":100,"actualScenery":3,"timesEntered":22,"soundActivate":true,"reminders":true,"tutorialComplete":true}

You can also change the amount of purchasable items in the same file or using LocallAPStore

Hope it was helpful

There is also a glitch: try to set ,"actualScenery":0