At the moment I was uploading, I'm just reached final stage in normal mode (I beat normal mode with Sanae the next day after upload date). If possible, I'll try to clear extra stage and make the video of it.
Anyway, Easy mode seems to be a lot easier and Normal mode is a bit easier than UFO. As I know, the reason is that ZUN has lower the difficulty of this game but I don't know about Hard, Lunatic and Extra mode yet.
![](https://i.ytimg.com/vi/iRchdijw6Pc/mqdefault.jpg)