When success is measured by how many pints of blood you spill, the satisfaction that comes from kicking foes into spinning saw blades, impaling them on barbed spears, or pummeling them into a spiked pit is all the more potent. They Bleed Pixels makes you work hard for every precious drop of the blocky red stuff you gather, but harvesting the macabre fluid from fallen foes to power your dark arts proves a surprisingly refreshing mechanic that helps make this punishing 2D platformer more fun than frustrating.