Use the arrow keys to move and aim z to jump (and wall jump) x to shoot c to switch weapon (you have 4) a to do a short jump Weapons: Weapon 1 (Peashooter) fires in 8 directions and deals average damage a pretty basic and useful weapon. Weapon 2 (shotgun) shoots a volley of 5 bullets but has low fire rate. Weapon 3 (BIG bullet) shoots very big but very slow bullet if aimed right can cause major damage. Weapon 4 (Missile) after shooting the bullet will go where you aim.
as you can tell this is kinda based on Cuphead because the weapon icon, the number of health and the 3 different phases in this boss.