Well now, what do we have here? Finally, a Dev willing to rock the boat a little. This pleases me. It seems that Pandaman has taken the usual shallow demands for fantasy, various worn out kinks and tropes, and given them all the finger. Already I can hear arms flailing about in the water, and that just amuses me even more.
As this is still in early stages of development, I'll be fairly brief and give you time to bring things into focus, but I will say that this one will be staying on my radar. Hell, the very first story board saying "human civilization is a cancer on the world" earned accolades in my book. On first impressions, the artwork is wonderful and carries a nice ambiance for the theme of the story thus far. As you said, it's a slow-burn, but I can understand that, given the character development and the path it's on at the moment. The relationship build between the MC and Maria is rather sweet. Patience is a virtue, and I think this one will be worth the wait.
Aside from obvious placeholders and headers yet to be worked on, there are very few spelling errors in the script thus far as I can tell, but there are grammatical / syntax errors that need to be corrected. Since the game is sort of in draft form, it's understandable, and I'm not going to lash you over it or anything- I'm sure refinement will come. Please do take your time and keep up the good work. You have the modest beginnings of something very interesting here, so don't give in to the demand for rush jobs and impatience of hoi poloi. Tell the story at your own pace.