The Challenge of Nexar

You are trying to become a Spectra-Warrior. To do this, you must fly through the levels of warp zones, destroying radioactive beacons. The higher the level, the more you need to destroy. These beacons are guarded by impact exploding saucers. You can destroy these saucers for points or avoid them. When you destroy a saucer or beacon, do not remain in the same place as the debris will collide with you. You have ninety-nine seconds to destroy the number of beacons indicated by the number on the bottom right of the screen per level.

Résumé

A single screen crosshair shooter written by David Lubar.