in part one, wasd to move, mouse to aim and shoot,

sometimes monsters drop powerups,

the big blue circle is a shield, while you have it, you cannot be killed by monsters, but it lasts for a temporary time.

the flying red dot is a damage powerup, the damage you do is increased,

the three bullets flying is a temporary weapon upgrade, your pistol may look the same, but it will fire three bullets per click.

in the second part,

ad to move w to jump space to shoot