A cool little VN with awesome art, especially considering the time constraints. Your art style is really nice, and to have the confidence to tackle a project that’s this art-heavy is really impressive.
I would’ve loved some music, or some ambient sounds even (like others have said I couldn’t hear anything despite volume sliders, although they might be there as RenPy defaults; I’ve never used it so I don’t know). Some cleaning up and polishing would be nice if you do end up continuing the project, like removing the option to click the options through Chapter 1 (such as room selection) twice, and some general proofreading, particularly with names.
The story was solid, if short, but I thought it was pretty good. I can’t wait to see how it continues, and if Cosmo and Ji-Hu will escape their shadow realm. I got all three current endings, can’t wait to see the rest. Overall I enjoyed reading and playing though :).