Wow, I'm glad I checked this forum today lol. I was just about to start make a Memrise course with your order of Core with audio. I would love to work with you adding the audio files to your courses 
For your Core 2k/6k Basic Pt 1 deck, are you aware that during reviews, it will be English to Kanji? Could you add a level where it is set to English Kanji so that when you are learning the word, you mostly see the kanji and during review, it is Kanji to English. As in, you see the kanji word at the top with English meanings as the multiple choice. Since my goal is to read Japanese, I like to learn words how they are because that is what I will be seeing as I read and not English.
Also for your Pt 1, Level 2 and 3 seem to be in a Kanji to Audio format.
For your Core 2k/6k Basic Pt 1 deck, are you aware that during reviews, it will be English to Kanji? Could you add a level where it is set to English Kanji so that when you are learning the word, you mostly see the kanji and during review, it is Kanji to English. As in, you see the kanji word at the top with English meanings as the multiple choice. Since my goal is to read Japanese, I like to learn words how they are because that is what I will be seeing as I read and not English.
Also for your Pt 1, Level 2 and 3 seem to be in a Kanji to Audio format.