No Matter what don't waste coins on new words
Difficult words can be 'bombed' if you don't want to draw them, but
that'll cost you coins which you can spend on other things like new
paint colors.
Although in the beginning you only start out with four colors, work hard to expand your palette. Obviously the more colors you get and use the better the guessing is. Earn coins through correct guessing. Color pack costs 249 coins, or roughly 40 to 125 games, so you'll want to spend your hard earned coins wisely. The holiday package, fall package, and ice cream package seem to be the most popular.