We're glad you're enjoying the game! The kiss marks are affection indicators. Pink for Carmilla and the Blue/green for Elizabeth. Every time you get a kiss mark it means you gain a point towards their good end :)
Can't wait to check out your LP!
Ooooh, I knew it. Thanks for the clarification!
Well thanks for that I've finally unlocked Carmilla True Ending. Such a sweet-adorable-carnalistic ending. And also Elizabeth ending of course