Congrats on making a game that takes satisfies both themes and fulfills all of the challenges to boot. Gameplay was simple and addictive, giving great arcade vibes. One thing slightly unintuitive was the control scheme, where the A and D buttons were a little harder to get used to since players normally associate them with left and right, and once you cross sides the buttons are "inverted". One alternative would be to use the up and down keys (or WA) which feel a little more direction neutral for increasing or decreasing the distance between balls. Other than that it was a well made game with well matched graphics and sound. Kudos.

Nice! Easy to understand with a simple but fun mechanic! Cool interpretation of the crossing paths! (Although I missed interaction between the two a bit. Something that makes them have a mechanical purpose - as the level was mirrored, so you technically were just controlling one in the end. Something like non-mirrored levels, different obstacles, collectibles, items, etc.) but this is still a neat and clean entry, good job! - it took me a few tries, but I got 0 in the end ;)