I like the visual abstraction and the music, which all together builds up to some short of amphetaminic vibe through space. The idea of being a particle is also original, and I think there is a lot of room there to experiment with quantum ideas, relativistic physics, etc.
What made me a bit confused is that the game is not completely full screen and there is no mouse pointer, so sometimes I accidentally minimised the window or got the windows start bar. This can be solved easily by just telling Godot to force full screen.
The never-ending tunnel brings replay ability, and that (IMO) is often really good. It tells about your skills, as you trusted the code to build up instead of scripting a fixed map. I didn't get the dice mechanic after all, but same with the mouse, I think it is just a matter of working on the feedback so the user can be informed on what is going on without assumptions.
Have a good day at the Department of Robonukes!