The problem with mouse sensitivity is a weird bug we don't fully understand yet, but we want to fix that.
About the rest - thanks for this feedback, this already helped us a lot! We were honestly thinking about some kind of tutorial but we were unsure how to do that effectively, but cheaply. I mean, without spending too much time working on a game but also without tedious walls of text. But once you've given us this feedback, I think I know how to do that perfectly and I release proper changes in the next update!
Also about the difficulty and learning curve. To some extent, this game always will be about failing and repeating without making the same mistakes. We will make the learning process as smooth as possible and finally perfect it in the next update (Thanks to your feedback!).
About sounds, well we are getting a lot of contradicting feedback. Some people like these rat sounds, others do not. Not sure what we should do about these.
Thanks for playing, and for sure I will review your game!