This idea seemed interesting, but the game itself just didnt seem fun to me.
Primary colors are wrong...
Just some advice, the primary colors are Red, Green, Blue. It's known as that universally on computers and even in the rainbow spectrum (Roy G Biv, notice how the first letters of each correspond to one of the primaries). Most people say "well, you can make green with blue and yellow". While this may be true, you can also make yellow with green and red (or green and blue, I forgot which it is). But anyways, any amount of any color can make every color, but RGB are the universal primary colors. Anyways, great game.
RoY g Biv... And mine doesn't have two of the colors right next to each other... Roy G. Biv isn't a standard of color spectrum. It is just an easy way to remember the colors in the spectrum. It's something you teach children so they know which color comes next when drawing a rainbow... not really much more than that.
Primary colors are actually arbitrary, the accepted artistic standard for Primary colors are Red Yellow and Blue. If you go into any art store and ask for colors in the Primary colors they will give you those. If you ask a printer what are the primary colors they will say CMYK. You ask a lighting technician they could say cyan magenta and green... you will get different answers based on the medium in question. However the accepted artistic standard of what primary colors are is indeed Red Yellow and Blue.
RGB comes from the cones in your eyes and what colors your eyes perceive and again they are just aribitrary choices made by developers of computers because no one set of 'PRIMARY' colors are truly the end all set.
Movement system needs improvement, along the lines of jumping/wall-jumping. Concept is great though. I'm glad you used stick-like characters.. if it were to be sprites or any other form of a person ( ex. Alien, Human, etc.) then it would look terrible.
But Primary Colours Are Red Blue Green
Ok, i guess.
The problem is the controls. Simply use the arrow keys, you know? Still, i give it a 7 for gameplay.