telc0ntar I read your review and just wanna share my opinion (and would probably also help those who are in the same boat as you).
Well, as you guess'd, this isn't really a game you can do with 1 hand (lol), since this game is very unique in that aspect (actually I don't think I've ever played one with the same battle mechanics or even close) but, it may take time but eventually, you can unlock her sex moves and use it in combat (if you prefer it that way). Sadly, it takes a couple of minutes as you said since you'd actually need to increase her max desire stats (actually, the cap for the stats) to atleast 75 by default to see most harassment and 100 to see most enemy H-attacks (though you'd actually need to have cock desire to be at the same level iirc.) And a lot more to actually unlock her H-skills so she can initiate it in combat (Like she needs to be forced to handjob enemies for x times to learn the handjob skill and so on and so forth.).
Sadly, (Haven't really finished floor 3 though), I think most defeat scenes... errr... mini H-Battles after being defeated, are tied to a floor level and doesn't really change much (though most you can do would probably limited depending on Karryn's H-stats).
So in short, if you are just looking for a quick fap material game, this isn't for you but if you want something new, this is one of the most quite challenging and fullfilling (IMO) H-games out there. Still,this doesn't really fail to at least make me fap one out everytime I play this even though most of it is repetitive as most games are, there's just something in Karryn that makes me so into her. Dunno if there's anyone else that could go higher than her in my list of "Fictional Characters I would fuck if I could, H-Games edition" besides Mikami (Vitamin Quest MC) I guess.
Also interaction between Karryn and the mobs are also quite interesting unlike most games that have only a line or two.
My only wish for this, is an actual impregnation and birth scenes which kind people are now working on since I also like that
I've also already "finished" Melty's Quest's storyline but haven't bothered completing everything and doing the re-runs (feels troublesome lel.)