Pit of the Condemned

This IFComp 2015 game places you in a preset underground map that is vaguely maze-like, and sets a monster chasing after you.

Although the map is preset, there are many doors that are locked, and the keys randomly distributed. Also randomly distributed are items to set traps with to kill a monster that is chasing you.

It is a fun game, with good atmosphere, but over pretty quickly. It would be fun to see the author add a version with multiple monsters, where you have to work harder to evade them and need to set multiple traps.