Most games on Addicting Games are Created with Adobe Flash. There are many open source (free) ways to create Flash Games (like FlashDevelop - http://flashdevelop.org/), and there are more costly ways...
Newton observed that color is not inherent in objects. Rather, the surface of an object reflects some colors and absorbs all the others. We perceive only the reflected colors. Thus, red is not "in"...
If it is good tequila the barrel aging process ( the same thing that makes brown liqours brown) if it's cheap tequila carmel coloring, that's why gold tequilas are often anajos and blanco or white...