How do I move to next tier in CSR racing in Windows 10?

[Windows Central Question]

how do i move to next tier in csr racing in windows 10

ive completed tier 1 but i cant change or move to next tier with mouse or anything please help me with controlls how do i change it

 

[I just wanna play]

I don't know, I have had the same problem. Has anyone managed to find a way to solve this problem?