Fun little game. Took two quick deaths to understand the mechanic fully, but once I got it I enjoyed it.
As others have pointed out, the initial speed of the monster made it difficult to tell if it was moving. My first impression was that I was running into static trap zones in a maze.
BUT once I sat in place for a moment instead of running full tilt and noticed the screen shrinking as -it- approached, it got a little spooky!