Here's a little retro-style shooting game I made for Android. It's called "Droid" and you simply destroy an ever increasing variety of enemy droids on each of the 35 stages. Ten unique stages are in the free version, and the paid version has an additional 25 unique stages. Both free and paid versions have separate online leaderboards. The paid version also has achievements. There's lots of hidden scoring mechanics in the game to discover, but you can just play it as a straight-forward shooter if you prefer.