I've put up version 1.1.0 of Galaxy Destroyer and Galaxy Destroyer Lite. I've added the ability to save and reload a single game. Basically if you save a game you can reload it and play it until you finish it at which point it is removed from the save. If you want to save another game while a previous save still exists it will ask if you want to overwrite the previous save.
I find very often in games that it is very easy to build up a ton of saves that I never finish so that is why I went this route, I figured one at a time keeps the size down and lets you focus. Plus I don't think games of this take so long that you'd have a bunch going at the same time, or a bunch that you want to save. If feedback turns out to be different I will probably change it, but I think this should work.
I didn't post about it but previously I added the ability to move the game to the SD card as well, always a good thing to include.