Whenever I'm mid-game and the girl says something about my physical appearance it throws me off guard. She'll interject a compliment and I typically just pause and then just keep going with whatever I was saying before. Is there a right way to respond to this sort of comment without the canned line "you're welcome" or just complimenting her back (seems beta)?

A couple times I've had girls open conversation with me the same way in a party setting and I didn't really know where to take it.