I ran into a few issues:
The itch.io client wouldn't let me install, I keep getting "Cannot read property "build" of undefined". I'm on Windows but don't have RPG Maker installed. I've seen this with other RPG Maker games though and it's no trouble to go the web download instead.
The enemy descriptions in the manual seem to have placeholder text and all just say "Tips about it".
In the first room with an Ensnared encounter, both cell entrances seem to lead to the same room.
Sometimes the background for battles was just a blur-filtered screenshot of the current map, instead of the corridor graphic, like I had opened the pause menu.
There were a couple of typos in the pre-Reliant dialogue (where you get judged for how many fireflies you spent, I think), I didn't write them down though.
The rendering froze during the Reliant fight during the animation for Light Touch (not for the first time that battle either). The game was otherwise unfrozen - the music was playing and there was audio feedback when I navigated through the menus, but I had to close out anyway since I couldn't read what I was doing.
I liked the monster designs, the rabbit theming made for a distinct band of creepy guys. I thought some of the strategy was a little off - I never bothered to fight the Sustaining except to heal a bit before running, and I always cheesed my way around wandering NPCs if I could avoid a fight. I definitely enjoyed the brevity - not that I was having a bad time, I just like a game I can play for under an hour and have a good time with. The manual looks slick as hell too.