This game is right up my alley! It brings me back to the good old days of playing agar.io or creatur.io, running around and eating others to grow stronger yourself. I loved the high level gameplay of the 3 different areas and choices of abilities along the way. It really made me want to play through the game 3 times to try out all the builds and get all the endings, and I had a fun time each go round!
My main criticism is that while the meta level gameplay is awesome, the second to second gameplay can feel unsatisfying. I never really understood how and when I'd get hit by enemies. The red ring is a good indicator, but I think every enemy has a different amount of time that you can spend in their ring before you get hit, which made it feel inconsistent. Additionally, when you bump into enemies you get slowed down a lot by the friction, which feels really bad when it causes you to get stuck and get hit.
Also, the controls pattern of using wasd to move and 123 to use abilities felt like it hampered the activated ability focused play styles, because I would often get hit when I have to stop moving to activate and ability with that finger. Moving 123 to mouse buttons would totally fix this I think.
Overall I loved the game though! The music is amazing and really fits the dino vibe, and the end cutscenes are super beautiful and made me laugh! I had a blast playing and I think you've made something quite special!