I believe that this engine change actively makes the game worse than the original version. I'm not referring to content type/amount here, but the engine itself is highly wasteful during all but the sex scenes. At this point you've already put a couple months of work in here so I doubt you care, but I feel I need to at least say it for my sanity's sake
As with every amateur developer that makes a "phone" based game, you basically change my 1920x1080 resolution into ~500x800 while also making the text tiny as hell for no reason. Also simulating a touch screen with mouse clicks has never and will never be fun. I get that you felt HTML was limiting you, but I really wish you had just gone with a standard visual novel instead of needing to simulate a phone here.
Then, while the sex scenes aren't wasting my screen size, they actually go the opposite direction and have way too large of text for no reason. The scene itself was written fine, but I felt like I should have had a bit more agency during it.
Finally a bug: The videos were attempting to play sound. I'm not sure if you just didn't cut it out properly, or if you actually wanted them to play sound (personally I'm ok with either if I know it's coming). The sound would start and then cutoff immediately shortly after each page of the sex scene loaded. If the sound was intended to come out I highly suggest reformatting your sex scenes to only have one video per page as it's just going to be an auditory mess. Otherwise just look into however your muting them or consider editing the videos again to remove the sound bits you missed.
I'll give this another shot in the future. Maybe I'm wrong, but this direction is disappointing.