Glad to see the game is coming along at a good pace. It looks like it's all nicely panning out. Though, I must admit, I am not to fond of hearing about a 3 star challenge world. Nonetheless, I'll wait and see how you do it before I knock it.
I have an idea where world 8 is. Well, I'll keep that information to myself. Wouldn't want to spoil the surprise. Can't wait to play this game when it comes out. Definitely looking forward to Funklen Forest if it is anything like your RMN 3 level with the same title.
Best of luck to you.