Josiah Jones of AngelWire Studio wrote in to tell us about his game Volcosis, and I'm kicking myself for having missed it before. Volcosis is a new twist on gravity-shifting gameplay. With the touch of a button, you can change the perspective of the game from 2-D to 3-D, and the gravity shifts with the perspective. You have to shift back and forth from sidescrolling to a top-down view in order to solve some devious platforming puzzles.

You play as a young male creature living in a primitive village. As the long intro explains, the female you want to marry has been thrown into a volcano by the village elders to appease the fire god--but she still lives, trapped inside the bowels of the fiery mountain. To save her, you must traverse a plethora of shadowy chambers, avoiding spikes and bottomless pits, and harnessing the peculiar gravitational properties of the volcano to survive. The levels get pretty tough, but the game is forgiving; after dying many, many times on any level, you'll be given the option to skip to the next one.

You move with the arrow keys, use X to jump, Z to shift gravity, and C to zoom out and see more of your surroundings. You can also configure the controls on the Settings screen, or just use an Xbox controller. There's a lot of game here, and once you beat the story mode, you unlock a new challenge mode. In all, there are more than 80 levels to conquer. In addition, Volcosis features a level editor, easy level sharing, and local co-op play.

Volcosis is a free download for Windows. I hope it becomes the sleeper freeware hit it deserves to be.