Gameplay - The combat is the core of the gameplay here and it's just too slow. The boss fights actually sort of work although they're definitely on the difficult side (Stun doesn't seem to do all that much, Luna's heal is worthless compared to High Potions, and Double Attack hits a bit too hard - even at level 7 the final boss can one-round a character if both hits land on them) but you have to grind first and the grinding is very bland. You very quickly hit a point where normal enemies do 0 damage, which combines with the slow ATB to drag out guaranteed victories and make them feel like a waste of time. At least you can auto-battle. 2 (but would be a 3 with some rebalancing and faster ATB)
Story - The basic plot is very generic but the character backstories are interesting enough and their banter is okay. There's not a lot that really jumps out at me, it's basically the character introductions at the beginning of a movie without the rest of the movie. 2
Presentation - The maps are fine although I'm fairly sure some are autogenerated. Pretty sure the enemies are just RTP recolors but the character designs are neat, and I like the music. 3
Creativity - Again, mostly generic besides the characters themselves, who I feel were the focus of development. 3
Horror - There's zombies and a netherworld but it's not particularly scary or atmospheric. 1
Theme - There is a jewel and it does seem to have some kind of curse, but it's not really elaborated on and seems to be the Not All that Glitters implementation as well, which is a bit underwhelming. 3
The credits mention we might see more adventures with Lune and Sol, and I would definitely be interested if you decide to follow through on that, but the game itself is just okay (and I can see where some people would get extremely frustrated with the slow grind and very RNG heavy final battle).