Hi :)

I’d like to implement some improvements to my game after I received some input about it. I understand that I cannot upload such changes to my itch.io project that I submitted but am I allowed to change the linked source code on github? Or am I allowed to change the linked source code on github only after the voting phase?

You can update your itch.io project (and source) to fix bugs, add features/improvements, etc.

Oh, I can even update my project with features and improvments? Great! Thanks for clarifying.