I will be honest and confess that i do not like games with random battles, and that unfortunately colors my opinion of the game. That has nothing to do with your game, as i cannot endure even the “greatest”, such a Final Fantasy, so please take it only as my dislike for the genre.
First, the good is that i think that there are a lot of content here. I assume you used some kind of graphical pack for the tiles and avatars, but that does not diminish at all the work you had to do to create all the maps, even if the labyrinth is in a kind of “loop”, and the scripts. The story is also interesting, albeit a bit cliché, maybe, and it is well told with the events of the game, at least as far i could see.
I tried to finish it a couple of times but could not defeat Sol and gave up. It was decidedly not obvious how to get out of the black screen with the items i received battling Nothing; i had ten or so glimmering stars before i tried to use them. This may be because i do not play this kind of games, therefore a seasoned player might use it the first time it is given; i do not know. The battles were boring for me, but of course i would say that 😊.
Despite everything, i believe this to be a good game.