Good game, but it could be better.
First of all, graphics were awesome, and programming, overall, was great. It entertained me for several hours.
However, it could be a lot better if you refined the gameplay. In order to be a successful player you need to spend a lot of time playing. Why? To get upgrades. Anybody could get full upgrades and pass everything really quickly. In contrast, most people will have lots of difficulty passing anything without upgrades. So, you ought to change that.
Also, there needs to be more instructions. Super eggs are confusing and unknown until the player actually collects them, and the same applies to milestones. It would be nice if the milestones were known as to make it easier to achieve them.
On occasion, I also encountered some glitches. Sometimes, a triceratops or stegosaurus can trap you in a crevice with no chance of escape. Also, red pterodactyls can be quite annoying and erroneous. Those need to be fixed.
Also, just for fun, you should make it possible to choose which color runner you want.