The inventory and toolbar as well as the dialogue window need an overhaul, we are slowly redoing some of the old UI when we can, but the high priority TODO list is huge.
The swimming was very slow before, we have decided to speed it up significantly so the player doesn't feel annoyed when falling on water and can move just as fast as in land.
We noticed the problem with the watering objective not marking as complete if you don't fully water to the max, we are going to fix it next build.
As for the memory use, we are trying to optimize when we can, but until all the major features are done we can't spare time to dig deeper into what is causing it.
Thanks for the feedback!