Invincible Beasts and Where to Hide from Them

Waaaaaay back when, I had a disc with some freeware/software games. One of these files was beast.com , a nifty little ascii game. Never been able to find it again. You squished most enemies with blocks, another enemy type could push blocks....and I soon learned that a custom game with 60(max) TYPE 3 enemies was unwinnable. These enemies were invincible and you had to trap them to make them explode into Type 1 enemies. But when there were this many, you instead had to trap yourself...and eventually they started blowing up your walls. And so a love affair of playing games in unintended ways bega...