Jonathan
(after two lessons)

import com.anysolo.toyGraphics.*


fun main() {
    val wnd = Window(640, 360)
    val turtle = Turtle(wnd)
    
    var turn = 1

    repeat(100000) {
        turtle.forward(turn)
        turtle.turnRight(241.0)

        turn++
        sleep(2)
    }
}

Billy101
(after two months)

package myapp
import com.anysolo.toyGraphics.*
import kotlin.random.Random

/*
* Author: bily 2019
* Left key to go left
* right key to go right
* space to shoot
* Have fun
*/

fun main () {
    val wnd = Window(1000, 700, buffered = true, background = Pal16.blue)

    val keyboard = Keyboard(wnd)

    var enemyBlockX =  Random.nextInt(30, 500)
    var enemyBlockY = 40

    var tankX = 365
    val tankY = 665
    var bulletX = tankX
    var bulletY = tankY
    var bulletSpeed = 0
    var stop = false
    var blockSpeed = 0
    var score = 0

    while (true) {
        val gc = Graphics(wnd)
        gc.clear()
        gc.color = Pal16.black

        if (score in 5..10) {
            blockSpeed = 12
            gc.color = Pal16.brightYellow
            gc.drawRect(wnd.height, wnd.width, wnd.height, wnd.width, fill = true)
        }

        if (score >= 10) {
            blockSpeed = 15
            gc.color = Pal16.darkGray
            gc.drawRect(wnd.height, wnd.width, wnd.height, wnd.width)
        }

        // Key codes
        while (true) {
            val key = keyboard.getPressedKey() ?: break

            when (key.code) {
                KeyCodes.LEFT -> {
                    tankX -= 10

                    if(!stop)
                        bulletX -= 10
                }

                KeyCodes.RIGHT -> {
                    tankX+=10

                    if(!stop)
                        bulletX += 10
                }

                KeyCodes.SPACE -> {
                    bulletSpeed = 15
                    stop = true
                }

                'R'.toInt() -> {
                    bulletX = tankX
                    bulletY = tankY
                    bulletSpeed = 0
                    stop = false
                }
            }
        }

        if (tankX >= wnd.width-1)
            tankX = 2

        if (bulletX >= wnd.width-1)
            bulletX = 2

        if (tankX <= 0)
            tankX = wnd.width-1

        if (bulletX <= 1)
            bulletX = wnd.width-1

        bulletY -= bulletSpeed

        gc.drawRect(enemyBlockX, enemyBlockY,40,20, fill = true)
        enemyBlockY += blockSpeed + 10

        if(enemyBlockY <= 5) {
            enemyBlockY = 20
            enemyBlockX = Random.nextInt(8, 500)
            blockSpeed += 1
        }

        //Tank 1
        if (enemyBlockY >= wnd.height)
            break

        //TANK
        gc.color = Pal16.brightRed
        gc.drawRect(tankX,tankY,34,34,fill = true)

        //bullet
        gc.color = Pal16.green
        gc.drawRect(bulletX,bulletY,14,24,fill = true)

        //bullet stop when reaches the top
        if (bulletY<=20) {
            bulletY= tankY
            stop = false
            bulletX = tankX
            bulletSpeed = 0
        }

        // Score board
        gc.color = Pal16.white
        gc.drawText(20,300,"Score: $score")

        if (
            enemyBlockX - 40 <= bulletX &&
            enemyBlockY + 40 >= bulletX &&
            enemyBlockY - 20 <= bulletY &&
            enemyBlockY + 20 >= bulletY
        ) {
            score += 1
            enemyBlockY = -10
        }

        if (score>=5 && enemyBlockY<=5)
            enemyBlockX = Random.nextInt(8, 500)

        // End of the frame
        gc.close()
        sleep (ms = 80)
    }
}

Hot potato
(after one month)

package students

import com.anysolo.toyGraphics.*
import kotlin.math.roundToInt

fun main() {
    val wnd = Window(800, 600, buffered = true)

    var kop=0
    var y = 0
    var x = 0.0
    var yy = 0
    var xx = 0.0
    var yyy = 0
    var xxx = 0.0
    var fastY = 0
    var fastX = 0
    var y1 = 0
    var x1 = 0.0
    var y2 = 0
    var x2 = 0.0
    var fast1 = 0

    while (true) {
        val gc = Graphics(wnd)
        gc.color = Pal16.brown

        gc.clear()

        kop += 1

        gc.drawRect(x.roundToInt(), y, 50, 50, fill=true)
        gc.drawRect(xx.roundToInt(), yy, 50, 50, fill=true)
        gc.drawRect(xxx.roundToInt(), yyy, 50, 50, fill=true)
        gc.drawRect(x1.roundToInt(), y1, 50, 50, fill=true)
        gc.drawRect(x2.roundToInt(), y2, 50, 50, fill=true)

        y += 1
        x += 8.0/6
        yy += 2
        xx += 4.0/6
        yyy += 3
        xxx += 6.0/6
        y1 += fastY
        x1 += fastX/6
        fastY += 1
        fastX += 2
        y2 += 3
        x2 += fast1/6
        fast1 += 1

        if(y < 0)
            y += wnd.height

        else if (y >= wnd.height)
            y -= wnd.height

        if(x < 0)
            x += wnd.width

        else if (x >= wnd.width)
            x -= wnd.width

        if(yy < 0)
            yy += wnd.height

        else if (yy >= wnd.height)
            yy-= wnd.height

        if(xx < 0)
            xx += wnd.width

        else if (xx >= wnd.width)
            xx -= wnd.width

        if(yyy < 0)
            yyy += wnd.height

        else if (yyy >= wnd.height)
            yyy -= wnd.height

        if(xxx < 0)
            xxx += wnd.width

        else if (xxx >= wnd.width)
            xxx -= wnd.width

        if(y < 0)
            y += wnd.height

        else if (y1 >= wnd.height)
            y1 -= wnd.height

        if(x1 < 0)
            x1 += wnd.width

        else if (x1 >= wnd.width)
            x1 -= wnd.width

        if(y2 < 0)
            y2 += wnd.height

        else if (y >= wnd.height)
            y2 -= wnd.height

        if(x < 0)
            x2 += wnd.width

        else if (x >= wnd.width)
            x2 -= wnd.width

        gc.close()
        sleep(20)
    }
}

Hot potato
(after one lesson)

import com.anysolo.toyGraphics.*

fun main() {
    println("remote")

    var taco = 15.0
    val wnd = Window(800, 1000)
    val turtle = Turtle(wnd)
    var shell = 15.0
    val tacostand = Turtle(wnd)
    var pizza = 15.0
    val potato = Turtle(wnd)
    val dirty = Turtle(wnd)
    var earth = 15.0
    val robot = Turtle(wnd)
    var remote = 15.0
    val chinken = Turtle(wnd)
    var buckit = 15.0

    repeat(400) {
        turtle.forward(shell.toInt())
        turtle.turnRight(89.0)
        shell = shell + 7.5

        tacostand.backward(taco.toInt())
        tacostand.turnRight(89.0)
        taco = taco + 7.5

        potato.turnLeft(89.0)
        potato.forward(pizza.toInt())
        pizza = pizza + 7.5

        dirty.turnLeft(89.0)
        dirty.backward(earth.toInt())
        earth = earth + 7.5

        robot.turnRight(79.0)
        robot.forward(remote.toInt())
        remote = remote + 7.5

        chinken.turnLeft(79.0)
        chinken.forward(buckit.toInt())
    }
}

Timoha
(after one lesson)

import com.anysolo.toyGraphics.*

fun main() {
    val wnd = Window(800, 800)
    val turtle = Turtle(wnd)

    repeat(11){
        // Draw the first vertical line and return to the starting position
        turtle.forward(100)
        turtle.penUp() // pen is up. We are just moving the turtle without drawing anything
        turtle.backward(100)

        // Skip 30 to the right and turn up
        turtle.turnRight(0.0)
        turtle.forward(30)
        turtle.turnLeft(30.0)

        // Draw the second vertical line
        turtle.penDown()
        turtle.forward(100)
        turtle.penUp()
        turtle.backward(100)

        // Skip 30 to the right and turn up
        turtle.turnRight(30.0)
        turtle.forward(30)
        turtle.turnLeft(30.0)

        // Draw the third vertical line
        turtle.penDown()
        turtle.forward(100)
        turtle.penUp()
        turtle.backward(100)
    }
}

Sanjar

import com.anysolo.toyGraphics.*

fun main() {
    val wnd = Window(800, 800)
    val turtle = Turtle(wnd)

    turtle.backward(75)
    repeat(5) {
        turtle.forward(150)
        turtle.turnRight(144.0)
    }
}

Kirill

import com.anysolo.toyGraphics.*


fun main() {
    val wnd = Window(800, 800)
    val turtle = Turtle(wnd)

    turtle.turnRight(90.0)

    repeat(4000){
        turtle.forward(122)
        turtle.turnRight(111.0)
    }
}

King
(7 year old)

import com.anysolo.toyGraphics.*

fun main() {
    val wnd = Window(800, 800)
    val turtle = Turtle(wnd)

    turtle.turnLeft(90.0)

    turtle.forward(300)
    turtle.turnRight(90.0)

    turtle.forward(300)

    turtle.turnRight(90.0)
    turtle.forward(200)

    turtle.turnRight(90.0)
    turtle.forward(200)

    turtle.turnRight(90.0)
    turtle.forward(100)

    turtle.turnRight(90.0)
    turtle.forward(50)
    turtle.turnRight(90.0)
    turtle.forward(40)

    turtle.turnRight(90.0)
    turtle.forward(30)

    turtle.turnRight(90.0)

    turtle.forward(20)
    turtle.turnRight(90.0)

    turtle.forward(10)
}

Kisn

import com.anysolo.toyGraphics.*
import kotlin.math.roundToInt


fun main() {
    val wnd = Window(800, 600, background = Pal16.black)
    val g = Graphics(wnd)

    var lineCount = 0
    var colorId = 1
    var x = 0.0

    while (x < wnd.width) {
        val y = x * 0.8

        x += 2.0
        lineCount++

        if(lineCount % 20 == 0) {
            colorId++
            if (colorId == 16) break
        }

        g.color = Pal16[colorId]
        g.drawLine(0, y.roundToInt(), x.roundToInt(), wnd.height - y.roundToInt())
    }
}