mighty impressive. very rare to see a lewd game that could actually stand on its own merits as just a game. tbh if you cut the lewd bits you could probably market to general audiences and do ok, its really that solid... assuming the combat gets more interesting outside of this first zone lol.
not that i MIND the lewd bits. personally i'm rooting for more fellatio down the line =P
having played through the demo i think the weakest bit is the music. it isn't BAD but just weaker than everything else, so if you have some time leftover in development it might be worth giving the soundtrack another pass, it feels kinda meandering and directionless, though the instrumentation is very nostalgic and generally fits the scene well enough.
really though, no complaints, this is already above average. good job.