Unbelieveable how a game with such a benevolent message could receive so many negative comments. I think the music fits really well with the style and message of the game. 5 stars :)
Nice game - smooth animation and it's fun to blast things, but for an extra element of challenge I'd suggest changing it so the machines also attack your mech (in different ways and from different directions if possible) while some attack the door.
 "Beloved"){kind=tracking}
 "Tesla Defense"){kind=icon}
 "Effing Machines"){kind=icon}