This seems to be a fairly common false-positive with Kaspersky, with Google searches showing even Microsoft products like MS Flight Simulator getting hit by it.
Ultimately Kaspersky isn’t the most reliable antivirus these days, and VirusTotal comes back with a completely clean result, including from their Kaspersky bot, so I don’t really know what to tell you. The game itself is just RPG Maker - a bunch of Javascript files and an embedded Chromium browser - but if you don’t trust it, don’t run it.