actually, once you play a little while, its AS easy if not easier than MM2. you just have to re-condition yourself to 8-bit mode, and earn your status one title at a time.
but heres some tips:
start with either galaxy or hornet man, both are pretty easy.
galaxy beats jewel
jewel beats plug
plug beats tornado
tornado beats magma
magma beats hornet
hornet beats splash
splash beats concrete
concrete beats galaxy
hornet chasers can retrieve items laying around
concret can "freeze" lava streams
SAVE all your screws until its wiley time, then LOAD UP on E-tanks.
dont be afraid to die and continue to refill your special weapons