This is a compilation of contest topics for easy reference. If this isn't categorized correctly please do move.
Premise is based on what I can see in screenshots/posts.
Explosive Entry - Builderboy - Announced 5/17
Premise: Use explosive barrels and your trusty oversized gun in order to move blocks into place to reach the next level.Vortex - leafiness0 - Announced 5/17Clones - Michael_Lee - Announced 5/17
Premise: Create clones and you can control any one of them. Also, walljump.Axe Shift - Darl181 - Announced 5/18
Premise: A port of the flash game Shift, where you can shift between two worlds, black and white.Escape! - yunhua98 - Announced 5/18
Premise: Block-pushing puzzle, including buttons, holes and other elements.Uncharted TI - Ashbad - Announced 5/18
Premise: Rockets go boom and spread fire too. Rope physics included as well.Bipolar - leafiness0 - (Used to be Vortex) Changed 5/18
Premise: Phase between two worlds superimposed on each other, in a Time Cufk style.
(NOTE: from insider info I can tell you that this isn't actually the final competition idea. I won't divulge further.)AXLE - tloz128 - Started 9/5/10, Announced recoding 5/18
Premise: Impressive graphics in a Mario-like platformer.Continuity - aeTIos - Announced 5/19
Premise: Port from the flash game Continuity. Combines puzzle with some platformer.Kirby - yeongJIN_COOL - Announced 5/19
Premise: Takes elements from Kirby, great graphics as well.Time Shift - SirCmpwn - Announced 5/19
Premise: Reverse time to solve some puzzles.Nymless - Freyaday - Announced 5/20
Premise: One pixel character action! Action-based platformer. Includes wall-jumping.Cube Droid Saves the Galaxy - ZTrumpet - Announced 5/22
Premise: Based on the Flash Game of the same name. Save the galaxy by solving puzzles.3-D Platformer Entry - squidgetx - Announced 5/22
Premise: Platform in 3-D! There's a whole new world out there!Doodle God - jhgenius - (Used to be Continuity), Changed 5/24
Premise: Based on the Flash Game of the same name. Combine elements to create the universe.Tag - leafiness0 - (Used to be Bipolar, which used to be Vortex), Changed 5/25
Premise: Paint gel on walls, converting the wall's attributes to traverse the spiky terrain.@all competitors: if you don't like my premise, you can submit one of your own.