Goal: Destroy the Orb in the middle as fast as you can, however in order to do that you'll need to Level Up!
Move using WASD Keys Target using Mouse Press and hold the Left Mouse Button to Shoot. Level Up using 1 2 3 4 5 6 7 Keys Press P to Pause.
Hints: You can also level up after pausing the game. Important: Remember to level up at the beginning if you're playing on Easy or Normal.
And yeah, It's recommended to play the game on easy for the first time. since the game is painfully hard. :D
More info in the game.
Thanks for playing.