Overall, the gameplay rules are clear.
-- In the gameplay summary, the "Position" phase lets you move any permanent that hasn't already moved this turn. However, no previous phase mentions that permanents can move. Based on later text, it looks like permanents can be moved during combat -- this should be noted in the combat section.
-- In general, when can you use a card's special ability?
-- "Damage dealt to permanent's (shield) is cumulative throughout the entire game." Does this get tracked, and if so how and with what components?