Nice job! Cool to have two very different games in one. On the 1VS1 I found that it was very hard to beat the CPU unless you drive very perfectly. What made that hard is that the colliders around the mud were too big, causing you to slow down when you shouldn't. I loved the music and the opportunity to change it, but the only thing that prevented me from giving the music/audio 5* was the lack of game audio. Some crash sounds, engine sound, sirens etc would have really helped with the atmosphere.

Simple but immersive gameplay.  The beautiful soundtrack and tight controls feel intuitive and easy.  The tutorial was a little wordy, but it was a small hump that lead to a great adventure.  This was a fun experience that can be enjoyed on any device that's hard to put down.