I really like your tool. My comments are not criticism.
Perhaps you've misunderstood this thread of conversation? My initial comment was a reply to the OP's question "I wonder if we can get it to let you draw the fonts directly in the boxes" offering many other apps they can use right now to do that, rather than waiting for you to implement (or not) their request. That was all.
With regards to FontForge, I frequently use the Bitmap Strikes Available to generate bitmap fonts from outline fonts. That may be useful, or not, for readers of this thread. But I felt it important to correct your statement that FontForge was only good for hand-drawing bitmap fonts - which is definitely not the case.