You are a Legend for taking your time to write this feedback!
Regarding the mouse you can change sensitivity in options the same way you can change difficulty :)
Also there are 3 levels available. Entry to the last one is hidden somewhere on 2nd level.
I would recommend redownloading the game since yesterday I've posted an updated version with couple bugfixes that some player encountered.
Cheers!
A member registered Apr 25, 2022