Dang, that's a lot. I would suggest lowering your game settings, especially graphics and lighting in general. If it responds late when you hover even in the main menu, it just may be that the game is too tough (aka. badly optimized by yours truly).
There is however another reason why this might be happening, as it happened before to one of the game's testers, and that is an antivirus, snooping around the files and using all of your PCs performance. Of course, do not disable your antivirus, but maybe keep the game running. This most regularly happens with 3rd party anti-viruses, like Avast, AVG, etc. As indie games, that are executebles and aren't from platforms like steam and epic AND don't have a "license" bought from the antivirus itself, are all targeted as dangerous automatically.
If you have a 3rd party (non-official by Microsoft) antivirus, check if you can whitelist the game within it. As the antivirus Avast, that a tester used, tanked the performence to oblivion, but only for a few minutes, until it marked the game as "Safe".
If whitelisting, graphics turned down AND waiting with the game on doesn't work, then I am sorry, but that would mean the game is just too much for your PC. I promise to do whatever I can to optimise my games better in upcoming titles and updates. Again, really sorry for this frustrating occurrence.