Control with WASD, Attack with L, Focus with P, Special attack with O. Press L or hold K to go through dialogue. Stand underneath enemies to attack them, pick up stars that drop by going close to them or the top of the screen. There are 3 resources. First, Power (Stars on bottom right of screen), which increase your damage and allow you to use a special attack at the cost of 1 power. Gain power by collecting red stars. Secondly, health (Hearts on top right of screen), Getting hit removes one life and causes you to drop 3 power on the ground, [Note: It is almost always better to use a special attack than to lose a life). Get health from collecting certain amounts of points. Lastly, points (Large number on left of screen). Gain points over time or by collecting blue stars. The amount of points you get is determined by your point value (Small white number on left of screen), which decreases over time but increases from green stars. This game is a bit hard, sorry :(
This is basically a rip off of touhou 11