Honestly, I don't CARE that I haven't played it yet, IT'S HECKING SRB1 BABYYYY! I played it in SRB2 (v2.1) then got v2.2 and saw it was gone, and missed it. 404, time later not found, and it's back, and looking GLOOOORIIIIOUS!
Best part is... they kept Earless (named after the Character Wad), the original sprite used in it, in the thumbnail!
I'm sorry I am just gushing over it, I will now play it.