DIRECTIONDUNGEON!
About
To the left is an opening, in all other directions a wall - but when you try going that way, something cuts you off. So how does your sludgy little body get out of this garishly colored prison? Obviously, by moving right! It kinda looked like you "phased" through a wall, but actually, there was nothing blocking you in that direction to begin with. Anywhere else, this wouldn't make be possible, but hey - welcome to the DIRECTIONDUNGEON!
< ^ > v
Controls:
W A S D or arrow keys to move
R to reset
M to mute music, N to mute sound effects
v < ^ >
Source code can be found here.
I used a bunch of sounds from freesound.org - for a list of all the sounds, please see Sounds Used.txt in either the game download, or the source code.