I think the combination of those particles, inside an unusual shape like in the two games you mentioned, would be amazing. Because it would really add the edge to make the players pay more attention.
You could also make the trails have different levels of brightness on different levels, so that on some levels it just serves as an eye candy, while on others, it actually helps light up the level and show thew players, what the level looks like, as they play more and more.
Tron in itself is an extremely fascinating and very fun concept, the whole idea of light which can be used to destroy others, whether it’s attached to a Frisbee-like disk, or to a motorbike.
It’s definitely one of those concepts, that are so simple, yet so addicting. Much like flappy bird.
The way flappy bird kept people addicted, wasn’t for the fact that everyone wanted to get to the end. It was the random placement of the pipes, which forced the players to be focused non-stop.
You could do that in this. Add things which make the players put more attention to the level as a whole, maybe moving obstacles, like pillars moving from one surface, and into another.
I’m not saying make a Tron-Flappy Bird baby, I’m just saying add things that would cause the players to have to keep their focus up, more often.
Also, explore how music works on the brain (just in a general sense). Because although you might find a piece of music to be a cool addition to the game, it might make the players really stressed. For example, really fast paced music would be something that I personally would find quite stressful in a game like this. Mainly because it would slowly act up my ADHD, and listen to intense music and keeping up dodging things, would be too much for me. But I really think it will also apply to regular people.
Try combining different types of music and sound, with different levels, to create different feeling. For example, some levels might take place in complex shapes, and have very slow and soft sounding music, while others might be on simpler and bigger levels, but will have fast paced music, to act up the brain once there is little space to move for the players.