All upgrades are free.
Even though the patient already died, his heart is still working just as strongly through. Your job in this funny Hardventure Into the Duat game is to control this heart through its fight for drops of blood into the realm of the dead. Jump, run and collect one drop after another before it removes as you also try to avoid spikes and enemies. That's a hard really hard venture to survive, right?! Much fun!
Arrows = Move / Jump