can you play this in windowed mode or full screen only?

This game is a lot more fun than I expected! There are a couple of things that bother me, when screen transitions there are 2 music tracks playing at the same time, not a big thing but it always sounds a bit unpleasant to me. The other thing is that the movement feels a bit sluggish, it doesn't matter that much at start but when you cleared the area it takes a while to go around picking up hp and arrows. Alternatively, when the area is cleared of enemies could you just automatically collect everything? A...