Here is a potiential fix for version 1.0 of Lust Affect. It contains a recompiled exe using a decompiled version of the game, should be free of any false positives and viruses since it's a clean build. If you want to use it for the peace of mind the option is available, otherwise continue using whichever trusted exe you have.
The main fix is the files in the game folder. Replace game.rpy and game.rpyc with those and it should fix the issue with the shooting minigame. In two tests I've done on two different minigames it has worked as intended.