Music Added! Homing Projectile!

I've just added some music to the game and tweaked the sound effects a bit.

Also the game ends eventually now, instead of just running out of enemies.

It's kind of a shitty loop, but it'll do for now. Also, I've been playing around with a homing projectile. That's your only weapon at the moment, but an upgrade system is in the works.

- minimalOcean