Not bad, I have hopes for future improvement.
1. Ambient and combat sounds could be improved.
2. Gameplay needs to be able to be saved so that a player can continue where he left off.
3. Game movement could be smoother, faster, or both.
4. More variety in environment interaction, say something like adding traps.
All-in-all a good beginning for a hack n slash. Adding limited roleplaying elements like skills or abilities would be nice.
These issues should be resolved before anyone should buy the next chapter.
The Oklahoman about Catacombs