Looks like the cool Google retro game Easter egg is not functioning. The only information on why this is happening is from a reddit post. According to the post, the reason for the malfunction is because too many duplicates of the same image have been uploaded to Google.
For those not familiar with the Easter egg the way it function was the following:
First, do a search for anything in Google Images.
Next, after the image search results loaded, type “atari breakout” and search again.
If you performed the above steps correctly the images in image search results would transform into Atari Breakout blocks that you have to break with a ball and paddle (above image).
I hope Google fixes this as Atari Breakout is one of the better Easter eggs that Google created in search that veteran SEOs play when they need a break.
For those that still want to play: click this link.