Niiiiice.
This is definitely one of the best sex games I've seen so far, maybe not necessarily due to H-scenes themselves (although they're damn hot, NGL), but as an overall rating.
Gorgeous art, fun characters (even Scarlet grew on me, despite my initial reaction to her being "f*** off, go and choke on a stick, woman") and REALLY hot H-scenes (I don't know what magic you've used, but holy hell, it works great). Even the mini-games strike the balance pretty perfectly, being engaging enough to give you something to do, but not difficult enough to detract you from the main point of this game.
The EXP progress does feel a little bit grindy at times, but then again, if you made it easier it would probably become too easy, so I wouldn't touch it. The only thing that I would add is something like an elevator system to the dungeon crawler. Not on every level, but maybe on every initial level - 8, 15 and 22. You'd of course have to unlock it by clearing either the section prior (so levels 1-7 for lv8 elevator) or the section connected to the elevator (so levels 8-14 for lv8). And the sex scenes... Well, I am kind of on a fence on this. On one hand, I feel like they are really, REALLY short. On the other, Japanese VNs for example, tend to REALLY drag their H content on. Possibly it's just my personal balance point being in a slightly different place. The mood and art is spot-on though.
Other than that... Well, I did want to say things about replayability, but after consideration I figured that it's something that is neither specific to this title alone, nor it can be really "fixed" so to speak, as it's a broader... issue may be a little too strong of a word, but you get my drift.
For a future project, if you are even planning on doing one, you may want to try expanding the story slightly? By that I mean... Now it feels like a film played on x2.0 speed. It's good for what it does, but in the future you may want to try slowing down the pacing and, like I said, expanding the story. VNs are mostly only good the first time you play through them, so if a story like that ends too quickly, that might cause frustration, i.e. the feeling of "Man, this had great art and characters, but it's done after only x hours? Come on man, don't do me like this, gimme more!".
Anyway, that's just my two cents. For what this game tries to do, it's absolutely amazing, keep it up!
PS: Oh, and the MC might be a little too simpy for my tastes, but seeing as it's a fantasy world where people are actually nice to each other (Hah! Imagine that!), it's not as big of an issue.
EDIT: Fixed the BOLD text - was 8-21, should've been 8-14