Many of the enemies appear and attack in predictable times, but there is a fair amount of randomness to the action. The game difficulty is fairly consistent, and the game as a whole is an above-average challenge. Some levels are easier than others, but not by too much. The graphics in Gates of Zendocon are adequate, with a fair use of detail and color, but they don't completely feel right for the title. Many of the game elements look simple and cartoony, instead of the sleek and rugged futuristic appearance traditionally associated with these games.
Sounds are also a mixed bag.
The good news is that the game features several musical scores, each one uniquely appealing in its own way. On the other hand, actual game sounds are mostly uninspiring, consisting mostly of explosions and the firing of your ship's laser. Worse, the sounds of combat drown out some of the music, which detracts. There is also a short digitized laugh at the start of the game, but nothing truly noteworthy. This game makes a strong argument for not judging a book by its cover.