We’re mentioning it again because Tecmo is bringing it over under the name A Topsy Turvy Life: The Turvys Strike Back. The ESRB preemptively announced the game with the following description.
This is an arcade-style shooter game in which players control enemy ships that must avoid oncoming laser fire from an "Earth Defense Force" spacecraft. As ships and other objects get hit by the blasts, bright puffy explosions occur.
The concept is better explained in video so watch this trailer.
A Topsy Turvy Life: Turvy Drops is also heading overseas. This game is something like Tetris except you create a giant block and chain lines to clear blocks on the bottom screen. Like The Turvys Strike Back, this game is played with the DSi held upside down.