I still hate the design with Genie Lamp in kq5. The only way you can figure out what it does is open it and that kills you. Plus in the Bandits den you can miss the gold coin when you leave with no way to get back into it, give madam muska the golden needle, and then have no way to get the cape to survive the cold. Plus you can forget the locket in the roc nest and then Cassima won't help you.
Let's be fair you won't become stuck if you kill yourself with the genie. You can't save during the death sequence. That's actually one if the more forgiving kind of deaths.
And there no way to become stuck I you have both gold coin and gold needle. Both can be traded with either character for alternate solutions. Although I think you get more points for returning the needle to it's rightful owner.
Also the hidden flashy item to be found was part of many early Sierra games! Flashy items are quite obvious. Even to this day games use the flashing to designate important items. See Call of Duty. I always found that if something flashes I need to pick it up!
Now hidden items those can be annoying! Remember the hidden bridle in KQ4, now that was obscure and not obvious at all! Once you missed it you missed it.