I'm another person who played this game a great deal as a kid and couldn't be happier to see it come to the Iphone. Firstly as a general comment, I notice that this version is much easier than the original. The first game I played I got the amulet but died on the way out. The second game I actually made it out. This was something that would only happen once in about a hundred games in the original version. There is good and bad to the current approach. Fun to win, but not as big a triumph when it happens.
Regarding the Scare Monster Scroll: Admittedly you should not be able to pick a scare monster scroll up again and use it a second time, but in the original game (or at least the Mac version I played) allowed you to step onto a square without picking up an object, or at least if your inventory was full you could step onto the square and use the scroll again without having it turn to dust. Also in the version I played, monsters would refuse to step on the square with the scare monster scroll on it even before you picked it up. If you saw a monster dodging around a square with a scroll on it you would know it was scare monster before you picked it up.
Discernment: In the Mac version I used to play, you could get a potion of "discernment" which, if drank (drunken?) would give you a little warning everytime you were about to put on or wield a cursed item or drink a bad potion or read a bad scroll. This system was one way to give you a hint about the identity of objects without identifying them either.
Scroll of Wild Magic: Remember that scroll? Extremely rare but it was great. You never knew what it would do but always something interesting. Sometimes it would say "Your pack grows yellow for a moment" and everything would be identified. Sometimes everything in your pack would get scattered all over the level. Sometimes you'd lose your memory and forget what all the objects were etc.
Love the new Battle Axe, War Hammer and other weapons. I notice that, unlike the original game, you can hurl these at monsters and then pick them up after the monster is defeated. This is a huge advantage and makes it far easier to deal with Medusas for example when you are confused by them. Just chuck your artillery at them and then pick them up for the next Medusa!
Those wands of paralysis are just too good. Get one of those with 7 charges and you're laughing.
Keep up the great work!!