What's this little red square in my hud?

[Fearless Airlines]

So, to the left of my "stars found" counter at the top of my screen, there is a little red square with a "1" by it in the manner of the star counter.

I've searched for what this is, but I can't find an explanation. Could someone please tell me what this is?

Thanks.

[imperialist]

It means you have collected 1 red sigil.

[ResidentEvil92]

Imperialist is correct. Also, red sigils are the hardest puzzles, yellow sigils are medium, and green are the easiest.

[Fearless Airlines]

The thing I don't get is why after getting all sigils A-1 through A-6, did I get this now? Does it mean that all the red puzzles I did completed a greater sigil? I mean, I of course already completed more than one red sigil puzzle right?

[checkers_of_shalmone]

Because you got 5 sigils from A1 to A6, and then spent 4 on the Tower sigil puzzle, leading with 1.

[Fearless Airlines]

OK. I get it now. tnx.

[ReptileHouse]

Yep. Extra sigils that will apply to a floor you haven't reached yet.

[Fearless Airlines]

The thing throwing me was that I didn't know the red sigils were subtracted from my hud toward the first tower level BEFORE I actually attemped that floor's sigil puzzle. This is different than the gated star levels, for which one's stars remain in the inventory UNTIL one turns them in for sigils.

[stcaFylnO]

Thank you Desk Rabbit and Imperialist.

There is no manual unelss I'm overlooking it. This old thread was the only answer I found. Seems obvious after seeing a matching pickup later, but wasn't observant enough initially.