I tend to enjoy clearing out all the enemies and exploring every corner
of the map, and Aquaria pretty consistently rewarded me for doing just
that! Nearly every end of the map contained something worth collecting,
and defeating enemies often caused them to drop ingredients for
cooking.
High points are graphics, music, exploration, and story. Low points are
that you can only save at a save crystal (multiple times I died after
exploring for a half hour beyond the last crystal — frustrating) and the
map overlapping itself in some areas and not allowing enough zoom. I
spent about 50 hours with this game getting all the achievements and
collecting everything.
Another strong offering from the first Humble Indie Bundle!