Edited a Comment which suggest to create the levels dynamic

Buhnenrennen/Field.cs

         private Dictionary<double, List<Groyne>> groynes;
         public Dictionary<double, List<Groyne>> Groynes => this.groynes;
 
+        // if there is a number of Groynes which is not "4", the program should also be able to work
+        // maybe we edit this as dynamic and add a new level like "groynes.Add(x+70, levelY.ToList())" till x = highestNumberOfTestData
         public Field( Groyne[] level0, Groyne[] level1, Groyne[] level2, Groyne[] level3 )
         {
             groynes = new Dictionary<double, List<Groyne>>();