I can assure you that there isn’t a trojan in the game. Please be sure to download it from safe sources and avoid third party sites for your protection. The game is available for free here.
Can you share the report that flagged the game as a virus? Perhaps I can identify some of the game’s behavior there, for example, at every launch the game sends an HTTP request to Itch to know if there is a newer version. This is the kind of behavior that I think can be flagged as whatever virus does similar processes.