A shoot'em up based on Space Invaders, where the player controls a spacecraft at the bottom of the screen moving left or right, destroying a wave of aliens above descending slowly in formation.
A text adventure that was later re-released with some added graphics.
The game was created using Gilsoft's Quill. You tell the game what you want to do by typing instructions via keyboard and the parser is based on verb / noun input.
Originally released in 1984 for the MZ-1500.
From MobyGames:
Demon Crystal is an action puzzle game. Scattered around the stage are numerous keys which help open locked areas. The goal is to find the big key which is needed to open the exit and advance to the next stage. Ares' only weapon is a limited number of bombs, which explode in a flame and can kill multiple enemies at once. The game consists of 30 stages (houses).
Mole Mole is a puzzle game in which the player has to navigate a rather anthropomorphic mole through top-down single-screen stages, with the goal of reaching the exit after having collected all the fruits on the screen.