Shares of social game maker Zynga (ZNGA) have taken it on the chin since the company's public debut in late 2011. The company's most recent sell-off, triggered by major restructuring announcements, has sent the company's stock price alarmingly close to its all-time lows once again. Clearly life on the public markets isn't as rosy as early purchasers had hoped. Is the stock cheap now? Just how big a risk does buying Zynga look like today? Fool contributor Andrew Tonner takes a look at this fallen darling in the most recent installment of our Ask a Fool series.