The game's concept is a reflex, trial and error focused platformer. Simplistic graphics and gameplay with challenging features. With colour's being the theme, obstacles will be successfully avoided when the player switches to the matching colour. An example of this would be surpassing a red wall by turning red or passing through green spikes by turning green.  The game is not too challenging for people as it does not have a steep learning curve. 

A nice, simple idea -- which means you can experiment with the mechanic to add fun.  Think about how the player selects their colour:

• Do they press a particular key to choose a specific colour? -- is this challenging enough?
• Do they press a key to cycle through colours (e.g. red->green->blue->red) -- this would add challenge if against the clock
• Do they have to visit an object to change to a specific colour?  -- this would make it more of a puzzle if certain colour-changers were in awkward places.