Eat the apples to grow your snake and increase your score.

Do not hit the walls or bite your tail!

Controls

• Navigate: arrows

• Start game: OK

Game Parameters

• INVTERVAL: pause (in seconds) between each game tick

• OUTLINE: toggle snake squares outline

• COLOR: change the color of different elements of the game

This is the minified version of the code, optimized to take as little space as possible on the calculator. You can find the full version here.

_B=False
_A=True
from time import*
from math import floor
from random import randint
from kandinsky import*
from ion import*
INTERVAL=.16
OUTLINE=_A
BG_COLOR=0,0,0
SNAKE_COLOR=0,255,0
APPLE_COLOR=255,0,0
BOTTOM_COLOR=50,50,50
SCORE_COLOR=255,255,255
SQUARE_SIZE=16
SCREEN_W=320
SCREEN_H=192
W=floor(SCREEN_W/SQUARE_SIZE)
H=floor(SCREEN_H/SQUARE_SIZE)
class Player:
  def __init__(self,x,y,length,axis,dir):
    self.axis=axis;self.dir=dir;self.positions=[]
    for i in range(length):pos=[x,y];pos[self.axis]+=(length-1-i)*-dir;self.positions.append(pos)
  def get_positions(self):return self.positions
  def set_heading(self,axis,dir):
    if axis==self.axis:return _B
    self.axis=axis;self.dir=dir;return _A
  def move(self):
    length=len(self.positions)
    for i in range(length-1):self.positions[i]=self.positions[i+1].copy()
    self.positions[-1][self.axis]+=self.dir
  def grow(self):self.positions.insert(0,self.positions[0])
class Food:
  def __init__(self,w,h):self.w=w;self.h=h
  def get_pos(self):return self.pos
  def spawn(self,snake_positions):
    self.pos=[randint(0,self.w-1),randint(0,self.h-1)]
    if self.pos in snake_positions:self.spawn(snake_positions)
def draw_rect(x,y,w,h,color):fill_rect(x,y,w,1,color);fill_rect(x,y,1,h,color);fill_rect(x,y+h,w,-1,color);fill_rect(x+w,y,-1,h,color)
def draw_square(xy,color):
  fill_rect(xy[0]*SQUARE_SIZE,xy[1]*SQUARE_SIZE,SQUARE_SIZE,SQUARE_SIZE,color)
  if OUTLINE:draw_rect(xy[0]*SQUARE_SIZE,xy[1]*SQUARE_SIZE,SQUARE_SIZE,SQUARE_SIZE,BG_COLOR)
def display_score(n):fill_rect(0,SCREEN_H,SCREEN_W,222-SCREEN_H,BOTTOM_COLOR);draw_string('Score: '+str(n),5,SCREEN_H+5,SCORE_COLOR,BOTTOM_COLOR)
score=0
while _A:
  snake=Player(4,floor(H/2),4,0,1);apple=Food(W,H);apple.spawn(snake.get_positions());fill_rect(0,0,SCREEN_W,SCREEN_H,BG_COLOR);draw_square(apple.get_pos(),APPLE_COLOR)
  for pos in snake.get_positions():draw_square(pos,SNAKE_COLOR)
  display_score(score);draw_string('Press OK to start! ',130,SCREEN_H+5,SCORE_COLOR,BOTTOM_COLOR)
  while keydown(KEY_OK)or keydown(KEY_EXE):0
  while not(keydown(KEY_OK)or keydown(KEY_EXE)):0
  score=0;display_score(score);first_frame=_A;just_ate_apple=_B
  while _A:
    if not first_frame and not just_ate_apple:draw_square(lastTailPos,BG_COLOR)
    draw_square(snake.get_positions()[-1],SNAKE_COLOR);lastTailPos=snake.get_positions()[0];just_ate_apple=_B;turned=_B;time=monotonic()
    while monotonic()-time<INTERVAL:
      if keydown(KEY_RIGHT)and not turned:turned=snake.set_heading(0,1)
      if keydown(KEY_LEFT)and not turned:turned=snake.set_heading(0,-1)
      if keydown(KEY_DOWN)and not turned:turned=snake.set_heading(1,1)
      if keydown(KEY_UP)and not turned:turned=snake.set_heading(1,-1)
    if snake.get_positions()[-1]==apple.get_pos():snake.grow();apple.spawn(snake.get_positions());draw_square(apple.get_pos(),APPLE_COLOR);score+=1;display_score(score);just_ate_apple=_A
    snake.move();self_eating=snake.get_positions().count(snake.get_positions()[-1])>1;out_of_bounds=snake.get_positions()[-1][0]<0 or snake.get_positions()[-1][0]>=W or snake.get_positions()[-1][1]<0 or snake.get_positions()[-1][1]>=H
    if self_eating or out_of_bounds:break
    first_frame=_B
  for i in range(4):draw_string('Game Over'+'.'*i,190,SCREEN_H+5,SCORE_COLOR,BOTTOM_COLOR);sleep(.5)