1. Please don't feel bad about your self for making it free even though some of us already bought it. I am confident that at least 99% of us don't care because it's supporting the ability for you to make more awesome games and the community copies are a thing for those who can't easily afford it anyway.
2. I worry about how the donations are used on the ground sometimes as I don't want to be responsible in any way for helping this thing drag out longer or creating another terrorist problem, but I don't blame people for wanting to help either.
3. I am so unbelievably Fing psyched that you are actually doing what I've been dreaming of and combining EXO and SEA into a multi level exploration system for alien planets. I really hope that some of the sound strider sound code is used to generate the atmospheres, flora and fauna on in the sea, on the surface, and in the air as well, even if it's only minimal at first.
4. I'm glad you are considering your mental health. I hope things improve sooner rather than later for you.