This is a neat game, I definitely think it has a lot of promise. I actually liked the scenes, I've never been a big fan of the stereotypical H-scene-style and I thought there was some real personality in the making of it which was neat. The animation felt fairly smooth and I think over time (and obviously as more content is added) this could be something really great.
As far as gameplay goes it was fun and I love the rouguelike/lite (? I never know which one) aspects. Fleshing out the replayability with the items/upgrades/etc will obviously go a long way to improving that even further.
In terms of actual constructive criticism of things I think could be improved;
For me, running on a desktop PC, I couldn't make the app fullscreen, nor drag the window around (alt-enter didn't work either). The lack of menu options is a little frustrating when trying to fix things like that, I couldn't figure out if it was even possible to adjust sound volume/windowsize/fullscreen/text speed/etc or there were just no options implemented, but I think that should probably be something that is established early into development to make it easier going forward (just in my personal opinion). Initial user experience can have a massive impact on the reception of the game, you know what they say about first impressions.
I would like to be able to left click to skip through dialogue as-well as use space. I personally don't like mashing the space bar over and over (and an auto-skip with options is generally provided in these sort of games). I wouldn't mind it following the standards in that regard for text; controllable write speed, click to skip, auto-play options and a scroll-up to read previous text. It does make life a lot easier. I don't know the development side of those things but if you were able to include them, it would be a nice quality-of-life for the user.
Key-binding customisation would be nice to have in the future too, so that people can play with whatever keys (or hands) that they would like to.
All in all however, I think you're really onto something with this. Just needs some time and love. I'll be following the progress and I wish you nothing but all the success in the world with this, truly.