However a few things the game seems to be lacking...
Freedom of movement, if i recall correctly, and i was just playing Secret of Evermore today... (which is by square, same style game)
SoM had essentially 8 direction movement (4 direction facing) without the restriction of tiles! Personally I feel it would be a big mistake to take that away from your game.

just a newcomer's two cents, lira, yuan...whatever
[EDIT]
I said a few didn't I? well...uh...the rest are pretty obvious at this stage
