It's a unique concept for sure. It looks nice visually and it's impressive that you managed to create multiple tracks and game modes in the jam duration. As others mentioned, I think the controls could be improved by not requiring the use of the mouse. 

Took a while to figure out how the mechanics worked - I didn't realize the roll button was actually clickable, I thought it was just telling me to roll... but how? After I got it, there's definitely something interesting here and it's well presented, but it's also a little tedious.

I think it would be better if the control scheme could be simplified. Right now, you click the screen with the mouse, then you press space a few times, then you press enter... you could, for example, do everything here using a single button if the dice roll simply defined your distance rather than specifying a max distance (I never saw any reason to go less than the max distance). By removing that variable, you could press space to roll which gives you a distance, then you could press space again to specify direction. I think that would make it a bit more fast paced and fun.

But I have to say, great work for just a couple days!

I like deconstructed game mechanics a lot and this works well enough to where I could finish a track my first try, but I think the car or maybe the time between dice rolls needs to be a little faster, it took me like 5 minutes to complete a single lap

This game looks great, the music is a straight bop.  I'm absolutely terrible at it though. 

A bit too loud ^^"