Firstly, thanks so much for replaying it :D
KIND OF SPOILERS BELOW
Secondly, weeeeell, you're not wrong really x3 I guess it kinda depends on how much attention people are paying to that sort of thing, but yeah, I can see how it would accidentally spoil stuff cos people might see the screenshots all black and red, then see that thumbnail and be like, hang on a minute, that's not the same... what's going on here?
Which isn't too bad if they just think that in passing and then carry on, haha. But if they study the image for long enough, then yeah, spoilers >.<
With any luck, people who are wanting to check out the game will just download it and play it before looking at comments or something x3