Gnomenreigen is a secret song in Piano Tiles 2. This song is painfully hard, and it has 23 consecutive double tiles to handle in extremely fast speed. However, there are kinds of strategies.
After both sections of double tiles there are holding tiles to relax. The ending of the Doub.Tiles stream can be quite tricky as well because it ends at the same column they started. Make sure you will get used to this.
Furthermore, this song has tons of single tiles. Strong accuracy and good endurance are needed.
The song's is structured like that: There are consecutive single tiles at the start. At the 1-star section there are 23 consecutive double tiles. After that, there are holding tiles to relax. After a while, a stream of single tiles start again, entering the 2-star section in the middle of these. After that, the 23 consecutive double tiles will repeat again, this time at a slightly faster speed. There are a few more holding tiles then to relax.
Beepy's version seems harder because of double tiles. It's now moved in UMod CALC(Chopin Alkan Liszt Collections.