Space Invaders Collection was my first CV game that I started some 10 years ago. Man, it seems like a lifetime ago now. Anyway, the project started and stopped many times while I was finishing college and finally got released in 2003, after I had met my wife and she kind of inspired me to finish the game. It became a "collection" because I thought Space Invaders wasn't the kind of game that would have generated a lot of interest back in 1982 so I thought that including both Space Invaders and Space Invaders Deluxe in the same cartridge would have been a good marketing decision back then.
Anyway, the game is now sold out, but I plan to re-release it soon, probably with some modifications to take advantage of the super module, especially in the sound area. In case you weren't able to get a copy of the original game, you can now play the attached ROM image using any good CV emulator, like BlueMSX.