A and D for moving around, Space for jumping, and once you get ahold of some throwing stars, use E. If you are on mobile, just use the on screen controls. If you have a controller handy, use the D-Pad, and also use the South button (on an xbox controller, that would be A) to jump, and the East button (on an xbox controller, that would be B) to shoot throwing stars.
There are a total of 9 levels for you to complete! Each one has its own challenges, so don’t expect to beat each level on the first try.