I’ve just tried it and all I see is a black screen, any idea why? 
Thats a creepy. Prolly old driver/card.
I don’t think my VGA or its driver are the problem, at least not for being old 
A simple idea: Silence.
If you have music or ambient sounds just fade them all out when the player approaches the creepy area. The player’s own footsteps can be very unnerving (Unless they sound like an army of crabs is following you around: See Diablo 1 ::))
And a bonus about going silent is that jump scares work better then ;D
Rythmic sounds, like heartbeats or breathing, can be very unnerving too, as well as low barely audible sounds, like soft moans or whispering. Track down Quake 1’s soundtrack and give a listen.
Visually you can tint the screen a different color, reduce the ambient light levels, or add subtle flickers.
It really is the subtle stuff that creeps people out.
For example, take Slender ;D
Simple:
- Create suspense.
- Keep the player paranoid.
- Let them relax.
- BOOM! In their face.
- Get a new email address to stop getting spam about people falling off their chairs
Mainly what you need to do is create a situation that the player wants to avoid, but trying to avoid it is almost futile.
Add in torch effects as I’m sure has been said above, create a monster that is invisible when in direct torchlight (and therefore only visible in the edge of you vision) and you can keep your players paranoid
Oh lord.
Bright: Most of the game takes place in a bright, well lit area. High contrast between any shadow and the sources of light. No, or few methods by which the player can attain a light source to help in those dark areas. However, make it so that the darkness is actually your friend.
Perhaps whatever is the monster, the enemy of the game, does not function well in the darkness. Or cannot enter it. Make them have to embrace the darkness, but still leave an inkling that things could go seriously, totally and irredeemably wrong for them for skulking in the darkness.
Ambient effects are good for this. While the player is on a dark tile, have a different type of sound play, perhaps have the background music die down, and make little, odd, low sounds. When in light, have ‘brighter’ music. Make it so that the player, who has read the instructions and the premise, still has trouble feeling “comfortable” standing in the darkness despite the safety.
A world of vibrant, full color people and places. And a black-and-white outline character who is quite literally “sketchy”. And they’re the only one telling you the truth.
Here is an article from valve: https://developer.valvesoftware.com/wiki/Intermediate_Lighting
About halfway down the page there is a section called “Lighting Psychology”.
It was written for 3D games, but you might find something useful.
I say making the actual area viewed by the player somewhat small. This way, not only is it hard to see (a similar effect to shadows) but gives you a lack of knowledge about what might be around the corner.
You might get some ideas from looking at the old classic Space Hulk. With a combination of “fog of war”, scan blips for unknown enemies and high difficulty where something dangerous can surprise you at any time it does really well on creepiness.
Maybe you can use something similar to the scan blips for noises heard in the darkness outside the range of your torch.
Take a look at “Corpse Party.” It’s a horror themed, visual novel for the PSP which uses 2d orthographical game play.
Some thoughts on how it succeeded with being creepy/scary:
- Had an inspection system (as mentioned before) that gave either a description or picture (many possibilities with this, one of the pictures would have a popup after a couple of secs)
- Pixel art of gore/blood (simple, but effective)
- Had animated scenes outside of game play to enforce plot (you can use this to make up for the pixel art)
- Sounds, Corpse Party had the luxury of having the scenes voice acted, but simple sounds like a door creak or a scream should be effective
- Setting, a dark abandoned elementary school with dead children/people is much more creepy than the standard dungeon that looks like crypts from diablo
- PLOT, I think this is the most important point. Read horror books if you have to. A good plot will make ANYTHING creepy.
Just some ideas to help you out. As for general creepy things/monsters try: ghosts of children, beheaded/mutilated people, people being “smashed” into walls/floor, and you get the idea: blood/gore
Taking a look at I’m Scared from the Free Bundle, I found out there’s a nifty trick to play with player emotions: Anticipation.
In this particular game (3D, but still), the cover has this ghostly face screaming, and I thought “Ok, this is going to be a screamer-type thing where a jump scare will pop up when you least expect it”, resulting in incredible tension as I kept expecting the jump to happen after every move… And I was just watching a video, not playing it!
Dropping hints about what bad thing might happen, and then not having that happen, can cause a lot of tension. Or having the bad thing happen in random unexpected moments.
Of course, once the bad thing has happened enough, players become immune to the trick, but it’s and idea.
Haah! 
Uh, loker, this is a java gaming forum, looking at your 4 posts so far…
I’ll just leave it at that…
Sounds. Sounds can make any game creepy.
Another thing that scares or tenses many people is to narrow the area which they can see clearly.
To make a game creepy, I’d like to use simple lighting effects (in 2D with alpha mapping, you could create torches with flickering lighting effects). Additionally, you could play with camera zooming and blurring effects. Scan lines are effective as well (vintage look & sometimes creepy).
In fact, music and sounds can create a scary atmosphere. The game “SCP-087” uses several noises in order to create a creepy feeling.
Alpha shades with a flashlight :point:
Slender is an excellent example of this. It does work quite a long way though. Far enough for anyone to not want to play the game anymore.
I just bought Torchlight (never played it before) for $3.99 at Half Price Books and finding it very fun (am now experiencing a “hang-over” from playing too long without eating/sleeping).
I don’t know that it’s a particularly creepy game (yes there are ghouls and ghosts and skeletons and blood), but there are some nice moments of anxiety. One type is the obvious: you never know when a horde of spiders is going to come crawling out of a bunch of surrounding grates, that sort of thing.
But another I just noticed, for me anyway, occurred on a level which takes place on what is sort of like a castle top. For the most part, all the terraces are bounded by fences or railings. But every now and then you get to cross a bridge that has no hand rails. I find this rather unsettling, even though it is impossible to jump off and hurt yourself, even if you try.
Maybe it is the contrast that makes this visceral: usually there ARE railings, so you pick your moments and take away the safety features here and there. If there were never any hand rails, then their lack would be ho-hum.
Okay! Here is a general principle to run by folks: If you want to make something really creepy, make the majority of it comforting and reassuring. Create lots of safety nets. Then, at key moments in the plot, remove them.
Using half-light or shadows for effect? Contrast this with bright lights. Using creepy sound effects? Contrast this with normal s/fx. Scary music? contrast with at least episodes of more neutral or positive energies.