Thank you so much man, it means a lot to hear that! :D
Yeah water-related levels in games are usually different, even though SH1's sewer levels are a bit linear, I still like them. (they probably wanted to make something a little different compared to the school or hospital)
I'll do my best when it comes to the full version but it'll take a while for it to happen. My friend and I who made the demo are currently recharging our batteries but will come back to the project eventually.
Thank you for the offer, we really appreciate it but keep it; You may need it, considering what the world is going through at the moment. Cheers!