Player.java

import greenfoot.*;  // (World, Actor, GreenfootImage, and Greenfoot)

public class Player extends Actor
{
    private final int GRAVITY = 1;
    private int speed;
    private int sprungK = -15;
    private int sprungG = -25;
    public Player() {
        speed = 1;
    }
    public void act() 
    {
        fall();
        if (Greenfoot.isKeyDown("space") && (getY() > getWorld().getHeight() - 80)) {
            jump(sprungG);
        }
        if (Greenfoot.isKeyDown("w") && (getY() > getWorld().getHeight() - 80)) {
            jump(sprungK);
        }
        if (Greenfoot.isKeyDown("a")) {
            moveLeft();
        }
        if (Greenfoot.isKeyDown("d")) {
            moveRight();
        }
    } 
    public void fall() {
        setLocation(getX(), getY() + speed);
        if (getY() > getWorld().getHeight() - 80) {
            speed = 0;
        }
        else {
            speed ++;
        }   
    }
    public void jump(int sprung) {
        speed = sprung;
    }
    public void moveRight() {
        setLocation(getX() + 3, getY());
    }
    public void moveLeft() {
        setLocation(getX() - 3, getY());
    }
}