Sounds like people will be sceptical of it being an actual scam
Do not do "clever" stuff like making the game do actual things on the user's system. Like trying to find data to scare the user
Most people do know if they play a game, so the issue should not even be an issue.
Also most people wanting to play games do not want to be educated, so you have to wrap it in a way that they want to play the game and the awareness/education is happening as a side effect.
If you succeed, you might not want to give scammers a manual how to improve their scams. But if your goal is awareness, you can keep it in general unspecific terms.
Basically your plot could be similar to games like Papers, Please or That's not my Neighbor. Only you would accept or reject situations, like emails or IT requests.
I do not think people would return to such a game on a weekly basis. This is not Wordle.
If I knew how to do that, I would make such a game myself and be a successful indie game developer ;-)
Papers, Please was apparantly made in Unity. Depending how you want to present the game you could use any other game engine as well, even rpg maker. I can also imagine renpy and of course godot. And for starters even twine.
So maybe have a look at common game engines and what they can do and what you can do and think about what you need to implement your intended game mechanics. But basically you can look up any of the tutorials on how to create your own game. Maybe do not search specifially for platformer games...