There's a a vague hint that the world they live is not the same as where they come from which is The Surface, implying some sort of parrarel world (the whole "I am not quite used to this world's law of nature"). I agree the implication I put was rather too vague, I was about to expand the demo a bit so I can at least make stronger implication but I was running out of time ; -;

But to explain further, Eden is parrarel world of The Surface (Which is like Earth, if you want to put it simply) where the sky is orange, the sun always shine, the stars eating each other and immortality is cheap.

I'm glad it runs smoothly! I was very worried that my instruction regarding the font weren't clear haha

Thank you so much!

I was planning a full game if this one is good, in term of mechanic, art direction and music.

Try to re-download the fonts at Font files. Hopefully it will solve the problem.