The bug is the two "4"s sitting on top of each other in the left column.
I did that by first sitting a 4 on top of a 2:
4 2 64 16
2 v 4 2 64 16
4 2 2<- 64 16
Awesome game, by the way!
The bug is the two "4"s sitting on top of each other in the left column.
I did that by first sitting a 4 on top of a 2:
Then dropping a 2 down on the column to the right: Then finally sliding that 2 left one before it had a chance to settle: