Wow, this was an incredible game, well done!
It's really nice seeing someone else who's passionate about games, and this is a very innovative concept that I haven't seen implemented in many other solutions before.
It's simple, yet complex in a way that is, without any other word that can describe it, beautiful. There is a surprising amount of depth for a (game-play wise) one-dimensional game, and the ability for the cubes on either side of the road to interact with the other side is also a very nice mechanic. The moving yellow obstacles need no introduction as what they do is somehow indicated to the user without needing words.
Like others have mentioned, this game has the potential to be very addictive and expansive, and it seems like an exemplar blend of accessibility, entertainment and addiction (to playing it)!
I could go on about how good this game is, but I'll stop here. Great work again, 5 stars from me!