From GameBrew - a wiki dedicated to Video Game Homebrew.
DStrosmash is a remake of the Intellivision Astrosmash for the NDS. The game itself is a mixture between Asteroids and Space Invaders.
Download and extract file.
DLDI .nds file and copy it to the the card.
Copy the appropriate image (probably dstrosmash.nds) to cart. There are no interactions with the filesystem, so it doesn't matter where to put.
The sky IS falling! Chicken Little was right! You're the laser battery Commander and HERE THEY COME!...an attack of multicolored meteors with an occasional spinning bomb that will blow up one of your guns if you let it land, AND -- to really make life interesting, some guided missiles and an Attack UFO! As your score goes higher, so does the excitement!
The objective of the game is to to hit as many meteors, bombs, missiles and flying saucers as possible, without being hit yourself. As your score grows higher, the game speeds up and gives you more challenge. Take turns with your friends to see who can get the highest peak score!
For original detailed game instructions (taken from the original game's manual), visit Blue Sky Rangers (Intellvision Lives!).
A/B - Shoot
D-Pad - Move
X/Y - Hyper (teleport)
L - Swap screen
Start - Pause, Continue
Tested on an M3 DS Simply cart (with dstrosmash.nds).
Works with NO$GBA emulator.
Sometimes after playing for a long time (10+ minutes, usually) the sound will either cut out entirely, or get stuck playing an annoying sound (usually the UFO).
The only workaround is to turn your volume down; rebooting the DS will also solve this.