This was honestly pretty painful to play. The monster encounter rate is way too high considering you have no encounter reduction gear or buffs and the fights are too tedious for that encounter rate as well.
Some issues:
Early on, you walk through another character. Looks a bit odd. The endless distance enemies are a bit annoying to fight because of the high miss rate against them.
The encounter rate is way too high to not have some way to reduce the encounter rate.
In the lightning area, you can equip accessories, but they are removed. Not sure which part is the bug.
Battle sprites are too big/high for the UI. Makes it hard to see some of the buffs/debuffs.
The UI is hard to read in some maps, especially for someone with issues with identifying colors.
Some of the item costs seem poorly balance.
I think I figured out the crash bug. I hit the attack button while another character was attacking and the other character's attack killed the enemy, so it is possible that at that moment, the character was searching for the enemy that had just died, but since all enemies were dead, it tried to search for a new enemy, but said new enemy did not exist.