How to create power-ups? Help pls...

The power-up I want will give our player (Special Man) sword or fireballs.
flowlab.io/game/play/483520

its http://www.flowlab.io/game/play/483520

thanks @jngthree

but its same link

oh, yes sorry

I founded how to create powerups but I didnt tested it , collision, emit,destroy. When hit, powerup will destroy player and emit our powerupped player.