As one of the last humans alive, you need to love you some zombies to save the human race. Revive zombies and help the un-undead escape thru the portal. Since zombies love beating hearts, distract them with yours.
Low Power is a game where in order to survive you must hasten your own death. You control a robot whose battery is constantly draining but there are valuable energy cores scattered throughout the level that will sustain your life. There are all kinds of dangerous environmental hazards that unless you enable your sensors/abilities (lights, shield, ground sensor, microphone) you'll never survive. However enabling the different systems will drain your battery even faster.
Hubert runs a park with the allegedly extinct dodo. You have gotten a pass to go hunting on his lands. Kill as many dodos as you can in the time limit. The higher your score the more money you have to spend on new weapons.