Great game! It was really enjoyable and very novel racing game.
I liked the length of the levels and that there were six of them. The ghost added when you retry was a great addition. I loved the heartbeat mechanic that sped you up at regular intervals, which meant you couldn't just grind against the edges the whole time and had to point in the correct direction.
The plaque was a nice touch but due to the speed you were traveling at was somewhat random if you hit it or not, unless you had memorised the tracks.
The sound and visuals were very good too.
This was really fun, I could definitely play more of it.