学习python编程，在新东方少儿编程官网的自由创作平台做的一些作品。

可以在线运行，效果如下(在新页面中打开链接):

代码如下（用到平台自定义的xdf库）:

from xdf import *
import math

SW = 768
SH = 1024
R = SW / 4
R2 = R * 2
RR = R * R
HFR = R / 2
SQR3 = math.sqrt(3)
SQR32 = SQR3 / 2
SQR3R = SQR3 * R
SQR32R = SQR32 * R
FY = 800
COLOR = 'blue'
COLOR1 = 'white'
SPEED = 1
SPEED_CANNON = 20
COOL_DOWN = 10
GRAVITY = 1
JUMP_SPEED = -10
SPEED_X = 2
rect = box(0, FY, SW, SH - FY, COLOR)

sx = 0
waves = [
    circle(R / 2, FY + SQR32R, R, COLOR),
    circle(3 * R / 2, FY - SQR32R, R, COLOR1),
    circle(5 * R / 2, FY + SQR32R, R, COLOR),
    circle(7 * R / 2, FY - SQR32R, R, COLOR1),
    circle(9 * R / 2, FY + SQR32R, R, COLOR),
    circle(11 * R / 2, FY - SQR32R, R, COLOR1),
]

def getByX(xx):
    n0 = xx // R
    x0 = R / 2 + n0 * R
    dr = 1 - (n0 % 2) * 2
    y0 = FY + dr * SQR32R
    dx = xx - x0
    dy = math.sqrt(RR - dx * dx)
    ty = FY + dr * (SQR32R - dy)
    ang = -dr * math.atan2(dy, dx) + dr * math.pi / 2
    ang = ang * 180 / math.pi
    return [ty, ang]

by = 100
ba = 100
boat = stamp("boat001@001N", 0, SH)
boat.vy = 0
boat.isJump = False
boat.ox = 100

life = 5
lifes = []
for i in range(life):
    lf = stamp("heart001@001P", 15 + i * 25, 15, 20)
    lifes.append(lf)

def updateLife():
    i = 0
    for lf in lifes:
        if i < life:
            lf.show()
        else:
            lf.hide()
        i += 1

isOver = False
overTf = text("Game Over", 50, "red", "center")
score = 0
scoreTf = text("得分", 10, 60, 30, "red")
fishes = []
fishPool = []
def getFish():
    if len(fishPool):
        return fishPool.pop()
    return stamp("fish001@001O")

def addFish():
    fish = getFish()
    fish.vx = -(1 + random(10) / 10) * SPEED
    fx = SW
    fishes.append(fish)
    x0 = sx + SW + 50
    a0 = getByX(x0)
    fish.move(fx, a0[0])
    fish.rotate(a0[1])
    fish.show()

addFish()

def updateFish():
    for fish in fishes:
        fx = fish.x + fish.vx
        x0 = sx + fx
        a0 = getByX(x0)
        fish.move(fx, a0[0])
        fish.rotate(a0[1])
        if fish.x < -50:
            fishes.remove(fish)
            fishPool.append(fish)

cannons = []
cannonPool = []

def getCannon():
    if len(cannonPool):
        return cannonPool.pop()
    return circle(0, 0, 5, "black")

def addCannon():
    ang = ba * math.pi / 180
    cannon = getCannon()
    cannon.show()
    cannon.move(boat.x, boat.y)
    cannon.vx = SPEED_CANNON * math.cos(ang)
    cannon.vy = SPEED_CANNON * math.sin(ang)
    cannons.append(cannon)

def updateCannon():
    for cannon in cannons:
        cannon.vy += GRAVITY
        cannon.move(cannon.x + cannon.vx, cannon.y + cannon.vy)
        if cannon.x > SW or cannon.y > SH:
            cannons.remove(cannon)
            cannonPool.append(cannon)
            cannon.hide()

def updateWave():
    global sx, R
    x0 = sx % R2
    i = 0
    for c in waves:
        c.move(R / 2 + i * R - x0, c.y)
        i += 1

def updateBoat():
    global sx, by, ba, score
    if boat.ox < 20:
        boat.ox = 20
    elif boat.ox > SW - 20:
        boat.ox = SW - 20
    a0 = getByX(sx + boat.ox)
    by = a0[0]
    ba = a0[1]
    if boat.isJump:
        boat.vy += GRAVITY
        boat.move(boat.ox, boat.y + boat.vy)
        if boat.y > by - 10:
            boat.isJump = False
            boat.vy = 0
    if not boat.isJump:
        boat.move(boat.ox, by - 10)
        boat.rotate(ba)

def removeFish(fish):
    fishes.remove(fish)
    fishPool.append(fish)
    fish.hide()
def removeCannon(cannon):
    cannons.remove(cannon)
    cannonPool.append(cannon)
    cannon.hide()
    
def checkHit():
    global score
    for cannon in cannons:
        for fish in fishes:
            if cannon.hits(fish):
                removeFish(fish)
                removeCannon(cannon)
                score += 1
                break
    global life
    for fish in fishes:
        if fish.hits(boat):
            removeFish(fish)
            life -= 1
            if life == 0:
                gameOver()
                break
                
def gameOver():
    global isOver
    overTf.show()
    isOver = True
    
def reset():
    global isOver, life, sx, coolDown
    coolDown = 0
    isOver = False
    overTf.hide()
    sx = 0
    boat.isJump = False
    boat.vy = 0
    boat.ox = 100
    while len(fishes):
        removeFish(fishes[0])
    while len(cannons):
        removeCannon(cannons[0])
    life = 5

def tap():
    global isOver, coolDown
    if isOver:
        return reset()
    if x > SW / 2:
        fire()
    else:
        jump()
def fire():
    global coolDown
    if coolDown <= 0:
        addCannon()
        coolDown = COOL_DOWN
def jump():
    if not boat.isJump:
        boat.isJump = True
        boat.vy = JUMP_SPEED
def keydown(code, key):
    global isOver
    if isOver:
        return
    if code == 37:
        boat.ox -= SPEED_X
    elif code == 39:
        boat.ox += SPEED_X
    elif code == 38:
        jump()
    elif code == 32:
        fire()
def loop():
    global isOver
    if isOver:
        return
    global sx, score, coolDown
    if coolDown > 0:
        coolDown -= 1
    if (sx // HFR) != ((sx + SPEED) // HFR):
        addFish()
    sx += SPEED
    updateWave()
    updateBoat()
    updateFish()
    updateCannon()
    checkHit()
    updateLife()
    scoreTf.change("得分：" + str(score))

reset()

也可以下载代码，本地python环境运行（用pygame封装了xdf库）。