Tiny Arcade Space Invaders Super Impulse World's Smallest

I collect these and have been looking for this one in particular for awhile. The batteries exploded and had to file away the battery acid to get it to work, but it's a great little addition.

Legit version of Space Invaders, responsive controls, sharp screen image--cool details too, for example the marquee lights up when you're playing. My only real misgiving with the product is the attached keychain bits, it's hard for me to imagine anyone wanting to subject their game to the hazards of being on a keychain, so it's really unnecessary and a bit of an obstacle unless you choose to remove it, and then of course you'd have the business of removing it to deal with. That's why I didn't give it 5 stars.