Diamond Dash

You are a highly trained commando sent by the Farturion Empire to reclaim a stolen cache of Farturion Diamonds. They were stolen by a group of Raven Warriors from the dark world Yranus. The diamonds are being held in an underground warehouse deep beneath the vile surface of Yranus. The warehouse has 5 rooms (25 in the registered version). You must pick up all the diamonds in each room to progress to the next level. Each room will be heavily guarded. The guards have no weapons, but since they are such vile creatures, if one of them touches you, you're history.
Your only weapon is a portable proton accelerator that allows you to blast large holes in the floor which the guards (and you) can fall into. The holes will "heal" after a certain amount of time. If a guard is in a hole when it heals, he will reappear at the top of the room. If you are in a hole when it heals, you're dead. You have 5 lives at the beginning of the game. You gain 1 life for each level you complete. When all lives are used up, the game exits to DOS. The arrow keys control your direction (up, down, left, right).

What is abandonware ?