The unity engine isn't friendly to older systems. I have taken this developer to task on for their development of the game so I am not one to make excuses for the developer. The unity engine isn't a static engine so unity of 5 years ago is not the unity of today, Engines evolve.Guess my laptop (Win 8.1) is not sufficient to play this game. I keep getting prompts before it even starts to update my video card driver but am running the most current version?! The game is slow and cannot click on anything. Well, fuck it for now and hope the dev can configure his game more friendly to older systems if possible.
Windows 8 was released 6 1/2 years ago. When you buy a computer you have to be prepared for it to become obsolete, with a desktop you can delay this by upgrading the video card and adding ram in some cases but a laptop is a luxury computer item because it CAN'T be upgraded for the most part. That means you as the user have to accept that game released in 2019 simply wont work or will work very poorly on your system and that isn't the fault of the developer. Unity is a resource intense engine that isn't for older or weaker systems.
Given how old your system is and you might have bought it recently as in the last 2 years but the technology is old if it is running windows 8 vs windows 10. You need to look at buying a new system and that means if you can't afford to do so to start saving now as things will only get worse as time goes on. And there has been a massive change in CPU technology since 2016 because the AMD, the ryzen release has forced intel to respond which has accelerated cpu advancement and that means a cpu bought in 2016 or earlier is going to become obsolete faster.