itch has a tendency to do this with a lot of hentai devs here, sadly. it's pretty much a russian roulette, u never know who's gonna get hit next and there's no explanation whatsoever. some devs have tried to negotiate, but the response is always that the decision is final and there's nothing u can do about it
some of these suggestions are not possible, sadly... i really wanted to make an option to play as onee-san as well, but it would make things so much more difficult for me. i plan on adding some cgs as well, and i would have to make two different versions of each and every cg. it also makes translation so much trickier
but also...
a lot of ur suggestions are 100% planned or are already in v0.04! u aren't supposed to be able to rail her all the way from the get go, i just don't don't have enough content in the game yet to make a smooth progression. she'll definitely wake up if ur being too rough, and she will get mad at u. and u abuse her a bit too much, she might do a little bit of stabby stabby, so please don't get carried away :3
she already can climax in the newest h-scene, though it's pretty simplistic and not as detailed as u described. i'll definitely go back to older h-scenes and upgrade them with new functionality too
there is already a little bit of voice acting in v0.04! she's voiced by wonderful Hazuki Mana. Hazuki-san went beyond all of my expectations and i can't be happier with my choice of a va for mayu ♥
lastly, i can't believe it's never mentioned that she's a giant sleepy head, it kind of just eluded me. makes so little sense that it was never brought up, now that i think about it ' v '
thank u so much for ur encouraging words ♥