Not really hard at all, heal+brutalize allows me to mob train entire maps as I encounter them and fight them all at once. I got an MP+ per hit sword and now I can heal infinitely in fights.
Probably would have bought this game if it were singleplayer. Multiplayer seems to add nothing beyond allowing you to stretch out gameplay with timers making people more prone to come back and play and buy the fuel. Which sucks because the core gameplay is actually really quite neat and it's a shame it's attached to a multiplayer style that just doesn't add anything cool. But, I will keep an eye on this and play a bit while I see how it goes, there is something special here.
House feature is pretty meh, I mean I appreciate the idea but if it has no weight on gameplay it's just kind of boring and time/money consuming. Though the only way to get furniture being vandalizing dungeons is great.
Not enough boss mobs, I rarely get a chance to cut loose and use everything at my disposal without it being wasteful, I want more challenging fights.
Good game by the way.
One day I would like to see a highscore list that isn't rampant with cheating (first day come on?) First run through was in six days. I like my vertical shooters