First of all, did you try asking in the game's own comment section? Its creator is in a better position to answer support question about their own game.
That said, the problem is obvious: you're trying to run a game for 64-bit PCs on a Raspberry Pi, which has a completely different CPU. There's no simple fix for that. Unless the creator can add a build for the Pi, your only real recourse is to use a compatible computer instead. Sorry.