SPIRAPHANTOM'S PROFILE

I'd like to note that you're a good man, sir, making such a present for your girl. I, personally, have some experience in making "game presents" - a game here for New Year Celebration, a game here for a birthday, and I can give some tips from experience.

I noted one thing for myself, perhaps, you could take it too: if you want to make a game present on a short notice (less than 6 months), you may not want to implement a traditional battle system. Or a battle system at all. Calibrating numbers takes a long time however you look at it. You could apply the method from Yanfly's educational comics, but it still takes a while.
There's also another methods in developing short games: you create a fixed set of 5-7 maps and try to make a story, limited by those.

You won't likely have enough time to make unique assets, but that's not really always necessary - there are plenty of graphic and music packs out there, which could add particular charm to your present.

Hello, guys. I'm Spira, I'm here to make games and, hopefully find some friendly colleagues to discuss game stuff. ^^