The main quest is good and original, I think the last part (once you've freed Elva to current end of content) could use some clarification, but everything before that point is clear.
But the side content is hard to reach, between the shacky english translation and missable requirements here and there. Most side content are linked and I don't know how I feel about that. For now it is alright to hit new game to complete some endgame content because you missed a blue rock in the first minute of the game, but it will grow less tolerable the further each content pieces are.
I spend two thirds of my time playing the game looking after the source code to understand what I was missing, when and where were the triggers. Now I know most of rpgmaker inner workings without ever using it.
I had fun tho.