Various pre-release cosmetic fixes

src/levels/mod.rs

@@ -12,6 +12,7 @@
 
 pub mod l01_minimum;
 pub mod l02_kv;
+pub mod l03_dict;
 
 use serde::{Deserialize, Serialize};
 
@@ -81,5 +82,6 @@ pub fn registry() -> Vec<Box<dyn Level>> {
     vec![
         Box::new(l01_minimum::Minimum),
         Box::new(l02_kv::KeyValue),
+        Box::new(l03_dict::Dict),
     ]
 }