I loved the art style. The graphics and animation were great.
I felt the mechanics were not telegraphed well - I had a number of times I died to losing all of my stamina, and couldn't figure out why. The Game Over screen saying "You Ran Out of Stamina" or "You Drowned" or "You were eaten by raptors" would help clearly convey to the player what they did wrong. You could also have the game pause when the tutorial text comes up, as a number of times I had to run back to the correct spot to read the tutorial pop-up. I can see some players missing it entirely.
Finally, the chiptune music was really enjoyable, but a bit loud. An option to mute or reduce volume would really help. In addition something to add in the future that could really add to the atmosphere would be some sound effects, growls from the dinos, a collision effect when you smash a raptor, etc.
Hope the feedback is helpful and thanks for the submission! I had fun with it :)