very cool, and cute game. but I think you should "smooth out" the character's collision, decrease some pixels, to make the collision with the thorns more acceptable, and diminishing those moments when the player thinks: "what? but I didn't even touch the thorn!", it's a little detail, more that will make your game much more fun! congratulations for the work !!

I found a bug, when you walk off a higher platform and land on a lower one, the dino run animation keeps playing, but the dino doesn't move. (I can move, I'm not pressing the arrow keys) Also, WASD should be other control keys. Finally, I may just be dumb, but when I get to the highest platform, and I jump to the side, nothing happens. I jump up off the screen? Nothing. How do I advance to the next level? Good game otherwise.

If taking into account that this game was created with a free version of Construct 3 it is pretty amazing

The game is good. Is kinda amazing seeing this has been made with free construct 3.

But here is my sugestion, I'm no construcct expert but try to use the Dino sprite on 

it's original size and zoom the camera near the player. And watch for those 

collision boxes, ok? Keep working hard and your game will be great!

well its really good for a first time plus with the free version of construct 3 its pretty limited with fonts and layers so nice