It was a breeze until level 5, where boss really had me stumped, at which point I realized that there is loot, and I can get it by throwing boxes (oops).
I'm really liking the loot system here. With managing risk and reward by choosing more damage or more loot+strength to open crates or having more loot-quality items.
I've spent probably 6 hours grinding everything there is in the demo ^^;;
Got 100 loot-quality (5items +20 each), and 18k stardust.
Feedback: There is probably needs to be a system for dumping all these stardust, as I didn't really had to worry about item's cost-to-wear stat.
Example systems: enchanting (minecraft), gambling (diablo) or enchanting-with-chance-of-item-destruction (MMOs). Something where it is possible to dump stardust indefinitely.