Gimp can many - it also
1 Change png to xcf (batch - eg using export_layers.py http://registry.gimp.org/node/28268)
2 Use the BIMP (http://www.alessandrofrancesconi.it/projects/bimp/) and my plug-ins Alpha-to-path-non-interactive.py (the default background color - white - can be edited on the other - in a notepad). However, for multicolor background score will be bad.
3 Such files (xcf + path), you can convert batch to svg (BIMP + script Saul Goode http://gimpchat.com/viewtopic.php?f=9&t=9511) - and choose Gimp or Inkscape

good luck
MrQ

ps. In Annex sg-alpha-to-svg-file.scm and Alpha-to-path-non-interactive.py
If a lot of designing with fonts - it can be useful
Font-to-SVG http://gimpchat.com/viewtopic.php?f=9&t=9595

Check brush fonts category from dafont.com to find a good text for the slogan.
Maybe some of these?

http://www.dafont.com/kill-the-noise.font
http://www.dafont.com/sticky-things.font
http://www.dafont.com/zombie-checklist.font
http://www.dafont.com/brushtiptexe.font

I would make it in Inkscape and use skew or some other transform method to get as close to the 100 as possible.

It might need a bit of editing but, ShockTherapy BB Font Family might work for you.