Love the game but I need help...

So I finished the Lindsey Stirling Challenge and i got the Crystalized Lindsey Stirling, I tried to use the Max Multiplier on 80-86 and it didnt work... I double checked it and it was on but it was still at 1 and not 14. Other than that, I love this game. The music is good although I think you could add more music. Thank you for reading!

Aliskinz about Pop Dash - Music Runner, v2.0.2