I've played a game called Zugya, but there was no "DX" on the title, nor it was made in 2005... but those screenshots are identical to the game I played.
It's a very nice game, but it's too damn easy. It also more akin to Bosconian than to traditional shmups.
It was fun for like 30 minutes, but I finished it in my 2nd or 3rd go, and never played it again.