Link should be safe, the author is using a program to "protect" the game assets. Unfortunately many virus authors are using the same program to hide from AV programs and as a result some AV products have a warning for every product that uses Enigma Protector.
P.S. Besides the AV problem using Enigma Protector is pointless because it's very easy to extract the game assets (
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) and significantly increases the game HW requirements ...