Did you ask for the creator's permission? Last I saw he doesn't want people to make IB sequels or fangames.
I was about to post that.
Well it won't hurt asking, you don't lose anything trying and you also show your respect to the original creator.
Try it and tell us if you got any luck with that.
Also, you can become experienced user really easily.
There are youtube step by step NICE long paced tutorials
for instance the following guy rocks!
CLICK ME!
Also check a tutorial game I made. It tours you on EVERYTHING in about 4 hours.
CLICK ME!
That said, worst case scenario you can always make your own horror and mystery game inspired by Ib.
Cheers mate.