There's an issue if you use the in-game mute and switch to another tab then return. The mute symbol indicates that it still is muted, but the grinding sound can be heard.
I enjoyed the game bar the last levele (i.e. level 20). Having to restart again and again because of not managing a perfect jump with Mary was annoying, but trying to get the last jump where they meet was far more frustrating as failure meant having to do everything again. And again.
 "Car Crush"){kind=icon}
 "Jim Loves Mary 2"){kind=icon}
 "A Quest for Idle"){kind=icon}