I haven't had this much fun in quite a long time, I've conquered all 5 girls about 5 times now. It did feel a bit like Huniepop at times but I'm pretty fine with that.
Even for a beta, it pretty much feels like a complete game already, which is an achievement in itself. I loved the music, (Especially the victory one.) it managed to not grate on my nerves after 2 hours or so as a lot of games tend to, which is saying something. The monotony of going through the same tasks over and over might need some work though, but I was okay with it for the most part. It was also pretty fun spotting all those references to older bits of NG's history.
If there is a small suggestion I'd make though, you should have a Help or Tips page (Unless there is one and I didn't know, then I apologize there.), just in case people miss out on reading some of the important scraps of gameplay information. Or maybe incorporate it into an Encyclopedia menu, for a bit of extra fluff to the game. Especially for Trish. I like Trish. ~ XD
By the way, THAT VICTORY MUSIC! (It bears repeating twice.) It makes you feel like you've kicked cancer in the balls!