When Tiny Speck Inc. launches the beta version of its first online game next week, it will do so with bulging pockets and a valuation north of $50 million. The company just secured a $10.7 million Series B from existing investors Andreessen Horowitz and Accel Partners, bringing its total venture backing to $17.2 million. Its first game, “Glitch,”is a cross between “World of Warcraft” and “Farmville,” the company says, and combines the whimsy of Dr. Seuss with the nuanced worlds of J.R.R. Tolkien.