GAMEPLAY: I frankly don't have the motor skills to get good at twinstick spacecraft games (are they called that?), but I definitely see what you're going for here. The physics of the ship feel very space-y, as they should. The 'how to play' section was vital in picking the game up, but didn't say as much as I'd like--I dove into a star thinking it'd help somehow.
VISUALS: I'm really impressed with how well you built an environment out of the shapes given. Most of that hinges on the particles--the ship's thrusters, the glow of the suns, the noise of the background, all good stuff.
AUDIO: For something named after music terms, I didn't hear much. Piano's nice, but god is it quiet. No sound effects for thrusters makes the game feel a bit flat. I would also appreciate proximal audio cues when I'm near things like the edge or the teleporter.
THEME: As above, I did not get far enough to see the 'big crunch', but I'll take your word for it.