Update :: I've made 3 extra tracks to play so that the music has a wider variety. I've also began implementing checkpoints every 5 levels. Thank you for the suggestion. (Here's the new music: https://sndup.net/8d88/20_full_new.ogg)
Wow, awesome! They sound excellent. Checkpoints every 5 levels will be good, now that you have 4 music tracks you could have one for each 5 levels.
