Yup, thats my take on the theme, lets hope i get stuff done this weekend thought.
Im using C++ with SDL2 on Crunchbang linux and Kolourpaint as my graphics-program
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Its probably going to be a case of googling what I need, when I need it with SDL2 (I have been using SDL 1.2 before).
Yup, so my plan is to have some kind of spores running around and spreading. You should be able to assign actions to the spores, the spores take resources to execute actions.
One action is the “spread action” which adds pixels around the spore, the “spreaded pixels” are areas in which the spores can go.
Hopefuly future pics will make my idea more clear.
My concept art (its beautiful):

Concept art of mycel spreading game stuff
The yellow thing is a spore, the white stuff is spread stuff, the red stuff on the spore is a selection.
You use the mouse to control the spores.