The custom color selection box only comes up if custom colors has been selected for that species before, just as in previous version. The boxes on the other hand... I can't select any postition where I want the species to appear. The only workaround is to click on the reset button, then click once in the box without moving it, then the species will appear spread out all over the field. But it's not possible to chose any other place or size where you want the species to appear. When it comes to the rest of the GUI... If you make settings on all the tabs, start a sim, save the sim, make new settings, start a new sim, then load the old sim, the old sim will only load some settings back. I found the following settings doesn't get saved:
General tab:
Waste treshold, Graphing update interval.
Physics and costs tab, Advanced costs:
All values have been reset to 0, except for the shell cost that displayed this value: 1,401298E-45. Clicking ok and then clicking on the Advanced costs button again will change the shell cost to 1.
Mutations tab:
Current multiplier doesn't get saved.
Restart and league tab:
Restart sim when all robots are dead doesn't work at all.
Recording tab:
Settings here doesn't get saved, and you can't have different values in the fields here.
There might be more settings that doesn't get saved, but these are the onces I've tested.