I have downloaded free versions of game for 30 years and NEVER had a problem with viruses or whatever else. I use good anti-virus software. ALL games should offer a trial or test version. they are WAY too expensive and have NO return policy. As I said quite plainly, every game I played and liked even a bit I ended up BUYING. I am on social security and disabled. can't afford new games, so I get older ones on gog when i do buy.
It's a shame. It's wrong, regardless any selfish justification.
Though it's especially bad because this is not a huge company like a AAA. It'sa very small indie dev fighting for each coin to invest it into development.
And then you complain there is not much to do.
Go buy that game on steam sale for 10 bucks. That's NOT expensive. If you can't afford that.. Don't play. Or save the money until you can afford.
On steam you can return it within 2 hours play time.
Believe me I'm holding back myself. In rl id say a lot more what i think about such mindset.
So you enjoyed the game. Then buy it... Here on forum