we just implemented jumping into caravan so we can add nice jumping passages, i.e. jumping from island to island in quicksand
another idea for the rune puzzles is the reading of runes to get hints.
So if you activate the rune, it switches to a readable character, so you can translate hints from the ancient language.
(technical: this could be done with a bitmap font, so you can write in glyphs)
this allows for very complex riddles, if needed