Thanks for the comments.
tunepunk
Yes, one of the things I'm working on is the story on the new backgrounds that complement it, so it definitely going to be added before the official release.
Voulk
That's the idea I had with the tutorials, to start with the simple stuff and add more complex stuff as you progress. It was easier to implement it on the static (Trial) levels because the March mode is randomized with enemy, terrain and resource drops.
Interesting idea about the multiplayer. I haven't considered it yet but if the game is successful on the market, I'll be developing it further and multiplayer will be on the list