This game is amazing! It has a very unique concept. The characters are aware of their own existence and know that we are talking to them through a puppet, so our interactions with them are much more interesting~ I also like that you show us how they feel when they are put in such a situation. This isn't the first time I've seen a game break the fourth wall and hear the characters talk about their feelings about being trapped in their own world, but I've never seen a game go deeper and make it a theme throughout the story (✧ω✧)
You can play any route first but I recommend saving Nulla route last for the best experience ٩̋(๑˃́ꇴ˂̀๑)
To the creator: If this is a game you made when you're not an expert, I can't even imagine what your next project will be like Σ(□_□)