Your game is pretty good. It's well made and functions alright with some nice 3D models. It's fast paced and keeps a player hooked for a little while and the art on the game over screen looks pretty cool.
For improvements, I would say perhaps adjust the obstacles. They seem a little wonky and spaced out at times which makes it look like the track's clear in places, and yet the player hits something that triggers the game over despite that. So I would say move some of the obstacles closer together.
I would also say the jump needs modifying, there are some obstacles that are difficult to jump over so perhaps adjust it to be a little bit higher. I would also suggest adding some collectables into the game so that it gives the player a goal and something more to focus on.
But other then those points, it's a solid start and works really well, good job!