Are there plans to make Becca fatter as the days progress?
There is, art is made, but will not be added until after the jam is over to keep within guidelines :-) You will probably have noticed a big jump in file size between 0.5 and 0.7, images are in there, just waiting to be set free.
You will get to see her whenever Blinky crosses her path, and while she's sleeping in bed.