If you want to play this game, it is probably worth it to check out the engine reimplementation: openmw.org It also runs on Linux and OS X!
Since the games engine was open sourced, you don't have to rely on the official 32-bit build! Use this: http://www.bit-blot.com/forum/index.php?topic=4313.0 Or build it yourself: https://github.com/AquariaOSE/Aquaria
The game is awesome, but... There's a problem with it on Linux - it always, as soon as the game is started, before any emulation begins, uses at least one CPU thread to the max. Thus one less star.
