Blort!

Blort! is a video game in the action genre and published by HennSoft originally released in 1987. It is currently playable on DOS.

Blort! is a free, single-player, monochromatic, keyboard-controlled shooting game. Imagine Space Invaders but without the invaders, which would leave only the flying saucers at the top of the screen for the player to shoot, and you have Blort!.

The story behind the game is that the player works for NASA, where his friend Sludge snuck aboard a barely functioning shuttle, launched himself into space, and shot down an alien ship. Now other ships are after him, and since there's no way to bring him back, you take control from the ground and fly a few more aliens to help him.
The ship barely works, so all you can do is move left/right with the Z/X keys. You can fire a cannon of sorts, but there can only be one shot on screen at a time. There are two levels with two aliens per level. In the second level the aliens will use land mines to destroy the shuttle.

The game has sound, but it is limited to a blinking sound when the gun is fired.

It is possible that we have multiple downloads available when different versions exist.