My review (Forgive my English, I'm a Spanish speaker and I use a translator).

Okay, the game concept is really interesting, as is the gameplay. However, I think it would have worked much better with an arcade style, since the controls allow for it. I'm not really a fan of the decision to use Undertale music, but it's allowed, so I can't say anything.

The controls are smooth, but sometimes laggy. I really like the fact that it has six levels divided into two chapters.

Overall, it's a good game that could be much more refined.

This is my full review (Don't forget to review my game, too).

The Idea is nice. I like that it's little difficult. If gameplay is more smooth it can be fun to play

I like the idea of the game, and it seems like it could be quite fun. However, I feel with the tracks and camera it could use some improvement so that the player can see what's going on more, especially on upcoming turns. I also think the environment could have some variation such as an alternating color to give a sense of speed to the player. In terms of gameplay, I believe it may be better to have faster turning to give the player more control, even if it's just buttons you can always spam, but I could be misunderstanding the intent behind the game. Overall, I think it has a lot of potential, but the gameplay could use a little tweaking. Good work.