Hey, there! Creator of SRB2 Hide and Seek right here. And I don't recall giving you permission to publically redistribute my WAD.
Though you haven't quite claimed this WAD for yourself, you didn't give proper credits neither. If you don't tell people who made this, people assume it's you. So that's a no-no.
Topic locked, link removed.
Remember: Ask the creator's permission before distributing, editing, or really doing ANYTHING with a WAD aside from playing it.