Power-Ups, Game Clock, Friends & more!

I've added a whole PILE of new features and tweaks!

• Power-ups are now included!
  • Grab a bag of beans from Jesse for rapid-fire zombo destruction!
  • Replenish your health with Emily's heart drops!
  • Boost that high-score with Zack's special delivery!
• Game time now runs on the HUD, so you can keep one eye on the clock.
• Game difficulty has been significantly adjusted! It starts slow but gets out of hand quickly...
• Added several more guest-fam appearances! Which one's your favorite?
• Touched up several zombo and BG textures!

Thanks to everyone who's enjoyed Duggan Donuts so far!