First of all, i'm just 30 mins into the game and the feeling is amazing. Such a great work guys!
I'm having some issues with the steam controller:
In normal mode ( it has the XBOX360 configuration ) the analog stick seems to work but in order to accelerate you have to actually push the stick to the top and that makes the steering practically impossible. Right trigger doesn't work as accelerator as suggested on the controls scheme inside the game options.
Then I tried to configure the controller to emulate the keyboard keys ( whose work perfectly ) but the game seem to still recognize the controller and use the input as a controller.. not as the emulated keyboard keys. So it's back to the previous issue.
Hope to figure how to fix this, and i'll keep giving feedback as much as i can!