I saw a temple at the beginning of Mt. Awesome and wanted to see if there was anything, and to my surprise, it looks like Ulipse's symbol is plastered on the entrance of the temple... I wonder if this is even an easter egg to W6 Sandbrick Sandbox from AF2? It looks similar to the entrance to W6. The lighting might just be acting weird making it look like Ulipse's symbol.
Update: I was wrong, it was a Geometry Dash Normal face, not Ulipse's symbol. I am an idiot :D