So far so good. The only thing is the Powerup one time was at the boarder and it was half out of the screen half in the screen. I know I have to fix the width or something.
One of the things to keep in mind is "white space", which is the area around an actor in the picture you used; Always try to crop your image to minimize that white space as it can cause those kinds of issues too.
When I grab the powerup, the enemies don't die. The screen shakes and thats about it. I have a bracket saying kill self. But when I change self and put in the pink and say actor, it turns to self automatically. So it kills the powerup but not the enemies. I am confused.
http://wrathgames.com/blog/free-development-resources/music/ is a great site for some royalty-free music. Also look up "cgMusic" to use math to create your own ;).
I just noticed, you do not have to create WASD as a separate control and do the extra coding. You can just select UP, and add the letter W. This should be mentioned in the updates section. But its still good to know the logic when we do it your way.
I had to tweak the collision part (the colliding shape detector) a bit to make it work due to updates. It works, but hope it will not cause problems when I finish tutorial 4.
There are many ways, including the collision tab (I often create a new box collision and then cancel as it will show the actual size if I've adjusted the collision box currently on it).
 "Brawlin' Sailor"){kind=icon}
 "There is no game"){kind=icon}
 "Spectromancer: Gamer's Pack"){kind=icon}
 "Stencyl Tutorial 4: Mouse-Based Shooting"){kind=icon}
 "Stencyl Tutorial 5: Music, Powerups, & More"){kind=icon}
 "Stencyl Tutorial 3: Attributes & More"){kind=icon}
 "Stencyl Tutorial 2: Attributes, Etc."){kind=icon}
 "Stencyl Tutorial: First Game"){kind=icon}
 "The Lonely Square"){kind=icon}
I'm glad you got it down :)