Shares of Nintendo on a roller-coaster ride.
The Japanese video game company tapped its own superstar Mario to finally run around on smartphones for its first original mobile game.
But since the launch of Super Mario Run on Thursday, Dec.
15, Nintendo's stock price has taken a hit.
Investors now jumping ship, dragging down the market cap by roughly $3 billion.
The reason why this is happening has to do with its rating.
You see, even though the game is currently the most-downloaded app on Apple's App Store, it has the most one-star reviews.
Customers have been voicing frustration over the game's cost structure.
It's free to download, but once you get past the third level, you have to pay $10 to unlock the rest of the game.
Players say this was never made clear.
Nintendo reporting it has reached 40 million downloads worldwide in just four days.
For NewsBeat Social in New York, I'm Rumi Fukushima.