A Space Invaders clone
Cash Invaders is a cross between Space Invaders and Galaxians.
I remember playing games of this sort in the arcades and this title has put me into a bout of nostalgia. The game feels so nice and the controls respond just like the old classics did.
Where this game differs from games like Galaxians is that your targets are spinning and rotating around above you, as you can see in the screenshot.
Other than that, this game is a fun download, and will keep you busy for a couple of fun filled hours.