I really like the art style and sound, which is why I'm especially sad about the gameplay :(
I don't want to repeat everything the others have commented, so I'll just add a few things:
1. The Intro was very long, considering that it only shows text on a black screen - you could have conveyed the same information over a radio set during gameplay.
2. As far as I see it, the very first obstacle requires a pixel perfect jump and failure results in an immediate game over, which is very odd. Usually there would be a safe area to introduce the controls before ramping up the difficulty, but you start with a hard and potentially deadly jump immediately xD
Because of this I died very often and had to exit the game with alt+F4 to restart, since the deathscreen either is permanent or VERY long. I would have loved to see the rest but this experience was too frustrating for me and I quit after the first dinosaur.
For me this scores highly in every category except gameplay, so apart from that - well done guys!