Go Beryllium

By Conor O'Kane (1st Place)

Go Beryllium is a quantum-electrodynamical endurance shooter in which the goal is to stay alive as long as possible. It is HARD AS HELL.

Spectrum Spelunker (Etc.)

By Rixxendrak/Tim Jenkins (2nd Place)

You are Hue, a little videogame guy. The object of the game is to shoot blocks to score points without falling off the edge of the screen. The rub is that you can only shoot blocks that are the same colour as Hue, meaning that you have to constantly change Hue’s... hue to survive.
 

Colourbind

By Finn Morgan (Joint 3rd Place)

A 2D puzzle/platformer in which the goal is to get your little car thingy to the end of the level. The twist is that gravity operates along three differently coloured vectors, each affecting similarly coloured elements in the gameworld: so red gravity affects red things, green gravity affects green things, and blue gravity affects blue things. Hence the name.

ColourWise

By Francesco Ariis (Joint 3rd Place)

ColourWise is a colour-themed puzzle game. The idea is to change your little block to the correct colour, and get it to the end of the maze. There are tonnes of puzzles, and a puzzle editor too, making it a pretty complete package.

Chaos Wave

By Abstract Soup/Syed 'Muz' Muzani

A very strange 2D strategy game in which three tribes of differently coloured monster things compete for resources and dominance of a hostile alien world.

Color-FULL

By Craig Savage

Protect your little ball thing from marauding enemies by using two differently coloured bullets: red for attack and blue for defence. Think of it as kind of like a static Asteroids.

Paint the World

By Jonathan Law

Paint the World is a vertically-scrolling shmup in which the world is dynamically affected by colour. When you shoot enemies, they drop colour chips (red and blue), which you can then manipulate to receive power-ups and alter the difficulty of the game.
 

Space Safari

By Wilson Saunders

Space Safari is a steampunk-ish platform game starring a colonialist adventurer with a grappling hook and a multicoloured laser gun, that he uses to rob aliens of their space gold, for the love of a beautiful princess.

Tinte

By Mark Alwyn Powell

A platform game in which the goal is to collect tubes of paint to restore colour to a black and white world. Beautiful graphics and sound make this well worth checking out.