LOL! Thanks a bunch.
I considered making the X symmetrical but where's the fun in that? :D I can confirm it's beatable though, I'm not terribly good at arcade style games like this and I've taken it to the end a bunch of times in testing now!
Agreed on the sound, I just did the logic driving it and suggested the tempo. Everything else, including the SFX, is all Themuckamuck's fantastic work. They also provided an easter egg sprite, let me know if you spot it!