Eh, I have to be honest..
First off this was hilarious, and I'm a HUGE fan of the Mastermind series..
BUT I think I prefer the previous art style. IMO Things seem too bright and that results in it losing some of it's satire. What I mean is that when the cartoon appears serious but is absolutely hilarious in its dialogue (as in MM 1-4) it makes it much more funny in my eyes. This more cartoony style does fit but it just doesn't seem as "golden" or polished if I say so myself. You know what they say, "If it ain't broke, don't fix it."
Also it was a little on the short side, but that wasn't a huge issue of mine.
STILL I can't wait for MM6! Great job!