I would like to say that I find the idea of the videogame very curious and interesting. And also said I think it is a great proposal and the work done is crazy, congratulations for this project, I hope you manage to reach many people.
While I understand that in the search for the idea of aesthetics of the product, the neon is used as a reference for markers such as checkpoints and the idea is to contrast with a darker environment so that these stand out from the rest, I have to say that (particularly in the areas of platforming without floor or areas where the floor goes down, which to say it, there are areas where the hitbox leaves the character stuck until the platform rises again) are very difficult to distinguish and it is a problem the simple fact of advancing and not knowing where it is safe and where it is not.
The timer I think is a very strict limitation, I don't think it's a bad idea, but the time it's given is too little and it's more stressful than anything else.
In the same way, the movement feels a bit orthopedic, since the sensations of jumping and dodging don't seem real in the sense that the gameplay is not as smooth as it should be.