disTortioN by VitreousGD (Unrated Demon Platformer) || Geometry Dash 2.2
Found this in the sent tab, probably one of my favorite platformers ever. The effects and decorations match the intensity of the song, everything is so vibrant, and the gameplay's very good. One complaint though, the saws in the third part are just a little bit too dark.
I immediately tried to beat it in one go because the level flows perfectly. It was pretty fun.