My Own Personal Quest: The Unknown Tome

The year was 1995 (I think) and a trade in the playground led me to the first gamebook I would call my own.. But for the life of me I can't remember what it was called.

It's odd because I can remember so much about the time at hand, even details of the book in question, but for the life of me, I can't recall it's name. Which is a bit of a problem.. Because I want to find it once more.

Which is where I am hoping you guys can come in. Can you help me name that book?

The door on the cover looked something like this, but ajar, as I recall.

From what I remember, the year was 1995 (so I have a rough time-frame for
it's publication) and, the book itself was about A6 in size, quite thin (only about 30-40 small paragraphs with a smattering of pictures) and, paperback (center-stapled). I also remember that the chatter on the playground at the time was that it had come out of a lucky bag.

Inside the book, I remember one key entry where you find a wooden table with a scroll, a bag of coins and, a key (I believe), and the scroll warned you to take only either the key or the coins. If you took both I think you fell in a river or something in the next entry and it was game over. I also vaguely recall the cover reminding me of the entry to Shadowgate castle. Well, retrospectively, as I hadn't played Shadowgate at the time. It was also certainly more cartoony in its style than Shadowgate.

I also VERY vaguely recall this book being numbered 1, so there where potentially a few in the series.. Maybe. That's a sketchy recall at best though.

As you can imagine, I am quite nostalgic about this one, so if you know anything, ANYTHING, I would love to hear from you.