There's a bug that makes it so you can hover over multiple boxes at once.
That wouldn't be too much of a problem, but when it happens you can't pick up any of the boxes.
Once things got out of hand it became really difficult to pick anything up anymore.
Other than that, it fits the theme nicely.

Also known as "I need to breathe in a paper bag, the game". The relentless influx of boxes is completely impossible to manage, and that's quite perfect for the theme, as well as rather amusing... and also anxiety-inducing. :)

There seems to be an occasional issue with hovering over boxes, as is suggested by the first comment. In addition, I feel that some sort of a sound notification or a GUI notice that the "output colour" has changed would be very useful. Crossing the room to find a green box only to have had the required colour change in the process gave me a remarkable desire to rage-quit.

Your game is very nice to play. The general impact is positive.
As a professional game dev I would suggest... just kidding haha
Nonetheless, if you want to work on this project more I suggest making a difficulty incresing algorithm.
Graphics - very nice. Controls on the other side are not working very well.
Maybe you could also take a glimpse at my game? I already enlarged it into a wholesome Android game :)