Well, I can't answer your question right now, sorry...
(Ignore the crap background)
Why is Mario killed? Answer: The middle part of the scroll is moving up but the ceiling is stationary, and Mario gets squished.
Also, what do you expect from a new powerup called Gunner Mario?
Gunner Mario fires rapidly in 10 directions, but only on the ground, and firing slows his speed down.
>Spin jump is being made. It doesn't have the glitching of getting hurt when spin jumping onto 2 enemies (in SMW) Still, the graphics is incomplete. Spin jump can't break bricks below in this game.
>When you stomp an enemy, you can hold A to bounce higher.
>The accelerating & braking mechanic is faster, to make Mario easier to control. Also one important change: B no longer works as the running button. Instead, you simply run by holding the D-pad.
>Infinite continues... and extremely player-friendly continue mechanics. Continuing resets your score, but boosts your state to Fire Mario with Fire-bomb upgrade(i.e. 'Full Power Up'), and sends you back to the last checkpoint. Your continue count is recorded though.
>Some more DPCM samples which are played on the title screen.