Clavaderem

There are 21 levels.

KEYBOARD:  Hold and release space to shoot

XBOX CONTROLLER: Hold and release A to shoot

PLAYSTATION CONTROLLER: Hold and release X to shoot

Once you are below a certain speed an arrow will appear above you. The arrow is where your shot will go.

Upon holding the shoot button the power-meter to the right of you will go up and down. The higher the power-meter is, the harder your shot will be.