As Ruby:
Arrow Keys to Move and Jump
(Hold) Q to Shoot
1 to face Right Fixed
2 to face Left Fixed
C to Throw Grenades
(Hold) Z to Block (Only blocks attacks from a direction facing)
Space to Punch
(Hold) X to fire Lightning
As Mech 01 - Ball:
Space to Thrust
Arrow keys to Move
Up to climb Rails (NCA)
As Mech 02 - Walker
Arrow Keys to Move
Click (Anywhere) to Fire Missiles
As Mech 03 - Climber
Arrow Keys to Move and Jump
Space to hit
Up to Climb Special Walls
Fight through as many enemies as possible for an endless amount of time using a machine gun, bombs, your fists, a Lightning Gun and, after a minute of survival, gain the ability to transform into one of the 3 Mechs of your choice all with different abilities and perks to help thin the herd of enemies to face/
You cannot manually replenish your supplies (Lightning Energy, Grenades,) and these things shall replenish over time (Lightning Energy replenishes 25% every 30 seconds, you get a new grenade every 7 seconds, etc) Though Health does not replenish.
TIP: Use "1" or "2" keys to face left or right consistently to fight against hordes better, especially with your gun, pressing them again disbales the effect.