Nice example.
One slight variation I am using is replacing the Dictionary object with a JSON object, which I have found to be more versatile for structured data (objects within objects, arrays, etc.)
An example with a JSON object named PlayerData, change the save and load actions, then use JSON plugin expressions and actions to access the data in the JSON object.
Load:
-> PlayerData: Parse JSON string LocalStorage.ItemValue
Save:
-> LocalStorage: Set item "PlayerData" to PlayerData.ToCompactString