It was a great game, the bike tires had an issue, I like the idea.

Had the potential to be really fun, but the physics were a bit out of touch but fun to mess around with it
The flipping in the air was a bit rigid as it seems to always reset my rotation
 And the level design would have some parts that would be unpassable, you could experiment with unity sprite shape, for cleaner curves

The minimalist art looked great and reminded me a lot of Alto adventure
UI was consistent and looked good
When I lost, I wished I knew my score and high score in the game over menu
For a bike game, the tyres of the bike didn't rotate which was weird 
Nice ambient sounds to drive home the desert feel 

Great art, Great UI, Great idea, but lacking in execution
Great job

Nice concept. The player was a bit difficult to control.