Hi there! Many many thanks for your love and support, I really appreciate it. And I am sorry for the issues encountered.
For the mouse input issue, may I suggest you try the Steam version? The latest version on both Itch and Steam is 1.1.1, but for the Steam build, a hotfix for a bug in input detection has been fixed, so it's a slightly updated version. This might help you solve the issue. (If you purchased it from Itch, you should be able to claim a Steam key.)
For the visual indication you mentioned, I am working on it indeed! Enhanced interactive design with a new framework is under development, this requires a rewrite of the whole game, and I already started working.