LLLLLLOVE the idea!
I know you were concerned with bugs and lack of polish, but I didn't really have problems with those at all.
I was more confused why you have to jump on top of the dinosaurs and why you take damage when they run into you. I feel it would have fit better as a riff of the original Dino Game if you had to make the dinos run into you by jumping when they jump or standing your ground when they try to crouch under you.
However, the music was nice, the art was accurate (love how it turns to nighttime), and the effects were satisfying. Well done! Hope you had fun making it!