I would LOVE to, but I'm currently in the middle of too many projects. I can help as a creative advisor if you need it, though.
As a gauge of my skills, in reading your blurb, I have an instant idea for something to make. I might even make it myself once my project lineup clears up.
You're in highschool, and your crush doesn't even acknowledge your existence. You gain an ability, for one week, to invade her dreams at night and rearrange her mind so at the end, you can ask her to prom. My first instinct is to make this adventure game style. Inspirations from Psychonauts (think the psyche ward).
The second idea is that you're a charming, witty young man who has everything going for him - a hot girlfriend, great friends - but your best friend is a loser. You subsequently get hit by a car and die. You then posess your best friend, who you know is in love with your girlfriend, and try to influence his actions (posession, casual guiding, complete control) into picking up your woman - because you want to see them both happy. Constant control will make him think he's lost it, and seek therapy. Not enough control will wind up with him remaining forever alone. I think this would make a wonderful visual novel.
Let me know if either of these catch your fancy, or if you'd like a little help perfecting another idea. I'd love to see it get off the ground, and am great at character design and writing. Even if I am a mad procrastinator.