@ Knolan , if you use itt for one year , i think you should be aware that you have collide_widget, collide_point to aid you , also there is a complementery framework called kivent wich is being continuesly developing. And as i pointed earlyer check out a simple game uploaded by me to google play made entirely in python+kivy:
I am well aware of those functions, but they only implement AABB collision which very likely will not be enough.
I haven't used kivent, nor have I said anything against it on my post. I have spoken from my experience with kivy (and kivy alone). Using it is definitely not productive for game development.
And again, go to pygame site and check their archieve, it is huge, you can find tons of snippets there in the gaming context. You don't have anything like that on kivy.