better compiler errors

src/cli/main.rs

@@ -173,5 +173,5 @@ fn parse_and_compile(opts: &PlayOpts) -> anyhow::Result<Vec<f64>> {
                 );
             }
         })
-        .context("Failed to process input tokens")
+        .context("Failed to compile tokens to samples")
 }

src/compiler.rs

@@ -302,7 +302,7 @@ pub enum CompilerError {
     #[error(transparent)]
     SlopeNotFound(#[from] SlopeNotFoundError),
     #[error(
-        "You successfully made a nilplet / noplet (and I don't know what to do with it).\nTo resume compilation, remove any occurrence of \"[]\" in your sheet music."
+        "🎉 You successfully made a nilplet / noplet (and I don't know what to do with it)\nTo resume compilation, remove any occurrence of \"[]\" in your sheet music."
     )]
     Nilplet,
 }