Well it seems that owners of Nokia N900 can play ADOM II on their phone too (at least it works for me with sound/music), crucial is downloading latest JavaSE and running webstart:
try this:

http://depositfiles.com/files/ocjg4zmkl

and when you extract it to ext2/ext3 partition this is needed to run:

./javaws adom-ii.jnlp

Good luck!