The music.
The game was not bad. The controls were so clunky. For example, every time I threw the red respawn thing, I mainly relied on sheer luck that it would land where I wanted it to. There was no way to precisely control it. Sometimes I'd run and attempt to throw it only to realize it never left my hands. So, I took MY hands off the keyboard and listened to the "8 Bit Spaceship" song over and over. Fantastic song.