Pretty good for a game thats only 534kb.
What you have been able to do with this is astounding. There i a great variety of enviroments in this game and having the player graphic change for each level is brilliant. The player's graphic and hazards also go in logically with the enviroment and monsters and the color choice is great for a horror theme. The animation is quite smooth although there really isn't too much animation, or detail for that matter, in this game.
Gameplay manages to be simplistic and challanging at the same time. The way it flows from one level to the next allows the player to try to beat their personal best without being repetitive.
Overall, great.