Unity game development level editor and development engine

I need a level editor for my game that can work on the website. My game is here: [login to view URL] I plan on using firebase to start, unless you have a better idea. Thanks. You will be working on my game BOOM Bound which is on 3 platforms (iOS, Android, Steam): [login to view URL] [login to view URL] [login to view URL] I just wanted to ask what’s the best way to make it where my game can have a feature something similar to this feature: [login to view URL] I’m thinking how my game would interact with this type of website when I build it. Goal is for players to create levels themselves, share it, and make money from it. Second goal is for players to create character skins themselves, share it, and make money from it. Also be able to buy my in-game currency on the website and game and have them sync it. How roblox works: The Roblox website has its own game engine like the Unity game engine. People download the Roblox software and then make the game from scratch. When the game is made then they upload it to [login to view URL] where other users can access the created game. To summarize my thoughts: Now in our case, I have a game already made and want users the ability to create their own levels. In that case, a small engine on top of the Unity Game Engine will be made. This game engine is specifically designed to only create the levels for that game. This game engine will be made in unity and its WebGL build will be uploaded to the website? The user after Login/Signup to the website will launch this app (Game Engine) and then able to create its own level. Those levels will then be shown in the game. Think Roblox, but a 2D-Strategy game targeted for audiences 18 and older. Anyone will just need an idea and then they can build, host, share, and monetize a level they created free. Monthly Recurring Revenue is a result of purchasing in-game currency to purchase publicly-created Skins & Level-themes. Tell me your price and time clearly and write " level editor " as the first word of your application so that I can understand you read whole job description .