seeing as the lyrics are the most important part of the grammar "element" to the game I would suggest subtitling the songs. I can't really hear the lyrics properly, particularly as I am concentrating on playing. Good songs and graphics tho.
my new favorite game about rockets :D 4/5 because if you press start and then don't press anything else you will eventually get enough money to progress without actually playing
 "Grey"){kind=icon}
 "10800 Zombies"){kind=icon}
 "Grammar Hero"){kind=icon}
 "Mitoza"){kind=icon}
 "High Tea"){kind=icon}
 "Collapse It"){kind=icon}
 "colorfill"){kind=icon}
 "Cheer you up..."){kind=icon}
 "Love"){kind=icon}
 "The Final Banana Peel"){kind=icon}
 "Paper Venture"){kind=icon}
 "All We need is Brain"){kind=icon}
 "Space World"){kind=icon}
 "STFU"){kind=icon}
 "Hostage Crisis"){kind=icon}
 "IntoSpace!"){kind=icon}
 "Boo Nilla Shake"){kind=icon}
 "Condemned World TD"){kind=icon}
 "Deep Diver"){kind=icon}
 "Elite Realtor"){kind=icon}