Thanks for checking it out! Those 3000 need a bit of training... hehe. But, I managed to get over 4000 yesterday (you gain more points quite quickly after you just got to the other side of the spiral part just before the 3000 score). So I can now say: it IS possible.
The sound and especially music just make up the whole game in a way. Kind of feels like the sound effects of the steering (left/right) are a bit too silent. But, I didn't want to take too much focus away from the music. Guess, I'll add a "flip" sound after the voting too. That action really needs to have some acoustic feedback. That "falling through the hole" visual really took me a while to get right, because the math of the render fragment shader is very simplistic. Finally just switched off it's rendering of the tube and just render the star field for certain conditions - and that worked out.
