Wow, really fun game! I ended up saving 4 dinosaurs, but man saving the 5th one is really tough.
I think the controls for moving the dinosaurs left and right could use some work because it feels stiff when you're trying to first move them, but then it becomes too slippery when you've already maxed their acceleration.
However, I'm impressed with what you were able to do in just a short amount of time. The game has style, it's engaging, and its actually addicting to try and hop from comet to comet. I also particularly like the sounds chosen to communicate certain actions/events. Seriously, awesome work!