Kinni

It's the same game system, but not the same developer. This one is Clymenia, while the other was PicoPicoSoft. They are rpg maker games, and there are a ton of others like them. Marionette Fantasy, also on this site, is also an rpgm game, made by yet another developer (X-toys).

It's a puzzle game where you put traps to take care of invaders.

SAVE.BIN I think it's this file. All CGs and scenes are complete.

I did. Got everything. I just ignored the error messages. It's not like they were preventing me from playing. I had no other problems.