The combination lock wasn't too bad, but I think infinite being 8 is eh. Not great.
After going inside "Of course you thank me, There was no one else strong enought to save you all." Incorrect capitalization, and enough is misspelled. Should be "Of course you thank me, there was no one else strong enough to save you all."
The start is combat heavy in a pretty dull way. The player is obviously drastically too strong for those enemies, no need to hammer t home with a dozen identical fights that have no variation. Combat in general is more interesting when you have more tools at your disposal, such as new abilities or additional party members, so combat should be less prominent when you have nothing.
Doodads with items but aren't chests (crate of gold, crate of silver, crate of rocks, the skeletons, pickaxe) do not stop giving items after looting. Infinite gold and ATK-ups. Also funny the gold crate gives you 10 gold and the random skeleton in a tunnel gives 12, infinitely.
Green grime on stuff lets you traverse it, allowing you to walk on walls.
You avoided the common pitfall of making maps way too big and empty. Too many games give you such a needless amount of empty space. I glossed over other mistakes, but as a whole the English is pretty solid. Very good by h-game standards. It's nice to have some class variety at the start in how you want your character to go.
Swinging and netorare are very promising tags. Obviously the current implementation of the goblin and Elira is bad, it glosses over entire character arcs with a handwave, but as things get fleshed out it could be good. I would love to be a corrupt bastard, steal hearts, and then slut them out. Especially if one of the girls gets very devoted and wants to give her virginity to my character, and I have her instead sleep with someone else for her first time, for my personal gain like to curry favor from someone important.
As a heroic paragon, getting cheated on would be great. Especially by a virgin that is devoted to me but my overly respectful reticence that has me consistently holding myself back from sex because of some sense that I shouldn't push her ends up leaving her vulnerable to seduction, as she does have physical needs. Maybe she thinks getting sexual experience would make her more appealing to me, so that I might start sleeping with her instead of treating her like someone too fragile for sex. Maybe she just can't stand the waiting and needs the release, hoping I don't find out. Just don't make the other guy an uncharismatic cockhead that looks revolting and pressures her into it. Honestly if she falls for dumb bullshit like that, let her die, I have higher standards than to put out for a retard like her.
Ultimately, my perception of this so far is that it'll take a long time to flesh out into something, but you have the foundational skills to do it. I'm optimistic. It's not good yet, but it can get there. I'll give it a rating after a few updates, when there's more to get a grip on.