Yeah, true, I wanted to add more sounds, for the flying bomb and also for the starting colony ship but ran out of time. But it is quite easy to miss without a sound.

Thank you! The multiple explosion effects are thanks to the sound effect engine from rFXGen, extracted, adapted and integrated into the game and used to generate them on startup, so partly that was Rays work too. :-)

Thank you! I planned to put some Galaga elements in there as well, but time ran out in the end. Still I'm happy with my procedural sprites and happy that they seem to be popular. 

Thanks! Writing the sprite generator (all aliens/ships are generated on program start procedurally) took quite some hours, maybe pixeling the art wouldn't have taken much longer, but it was fun that way.

Thank you! Indeed, music would have been cool, but deciding between trying to do something with music or polishing the game, knowing my musical skills, I decided for the latter.