I suggest you try reducing your colors. Youve got shades that are almost exactly the same, also, why three shades of red?

 it's really cool!

love the fonts and the icons and the white outline fits really well

nice job!

 The hearts were added after a revision of the post. As for the outline - they are actually insets behind the hearts; have a look at this screenshot from the latest build.

 Is it marked? 

I'll get a hold of the admin :)

 uhm, I don't think this should be marked for the weekly challenge.

 Gonna second what Paddy said about the hearts. Their shape is fine, but the band-y outline makes it stand out from the 2 pixel wide shadow of the other icons. Great job on the rest. 

 Thanks Paddy. The bar is actually the coded bar directly from Flixel Power tools. I'll maybe make it into Zelda like hearts or something; but it really depends on how much I am going to work on implementing leveling. Anyways - your feedback is greatly appreaciated!

 Looks really nice, however I feel as if that gradient health bar doesn't fit with the rest of the piece, isn't very "pixel artish". Other than that it's really nice. :)