The aesthetic is awesome, first of all - I love the look of the game. The pixel art is super cute, and the elements are all very easy to read.
I do think the major issue is the hitboxes - they are way bigger than they look, which leads to many instances where I got hit while visually appearing fairly far from the creature that damaged me. Often after dying, visually even the shadows of my dino and the dino that killed me aren't touching, which often feels like I got cheated, especially early on when I was learning the game and where the hitboxes actually were.
You can also farm dodges pretty easily off the flying enemies - it's possible to increase your multiplier by 4 or 5 just off of one of them if you trail behind them as they fly across sideways. This means you can farm your multiplier up pretty quickly pretty early on if you're aware of this strategy, without a lot of risk. This can be exploited for some pretty high scores.
I also think that the difficulty doesn't ramp up very much - it would be nice if the game got a bit faster, or forced your to jump or slide more frequently somehow. In my score where I exploited the above strategy, I managed to hit over 350,000 points and I don't think I ever used the jump or slide at all - they were simply not safe or consistent enough to use compared to just dodging around enemies and obstacles.
I'm also not entirely sure I understand how the health/death works. Sometimes I get the Watch Out! message and my multiplier goes down, but other times I feel like I immediately get double hit and die instantly, and I'm not sure why that is.
Overall, though, it's a good bit of fun! I think the dodge mechanic is a great way to encourage risk-taking for more points, but the game's pace ends up being a little too slow without ramping up enough as time goes on.