I am also someone who worries about malware, so I scanned it, and played it on something called 'sandboxie', assuming you have a pc, it lets you play or use things in windows that are boxed off (AKA makes viruses not be able to touch your pc) So I highly recommend downloading it. I scanned it on VT and got 100% safe results, tested in sandboxie, and I didn't have issues with performance (aka fps drops with overheating which could be a virus sign), but at ultra my fps stayed well above 180 fps and my pc temp stayed at around 50c for my gpu and cpu. I promise on my soul this is safe, and the effort is clearly a passion project, I doubt this much effort would go into malware anyways- Though if your still worried, you can safely play the whole alpha in sandboxie. Have a good day!