INTERMISSION: All the music from the first half of the game.

Track 1 - Lightning Strikes Again

 Track 2 - Tan Tan Ta Ta Ta Tan

 Track 3 - Don't Go Off

Track 4 - Fighting Back

Track 5 - What

 Track 6 - Evil Destroyer

 Track 7 - Space Walk

 Track 8 - Danger!! Danger!!

 Track 9 - Attack Sharply

 Track 10 - The Sky Line

 Track 11 - Air Raid

Track 12 - Simmer Down

 Track 13 - Sand Hell

 Track 14 - Where!

 Track 15 - Strike Out

 Track 16 - Battle Ship

 Track 17 - Stranger

 Track 18 - Neo Weapon

My personal favorites:
Tan Tan Ta Ta Ta Tan
Don't Go Off
The Sky Line
Neo Weapon