Update play-snake.ps1

Scripts/play-snake.ps1

@@ -1,3 +1,17 @@
+<#
+.SYNOPSIS
+	Play the Snake game
+.DESCRIPTION
+	This PowerShell script lets you play the famous Snake game.
+	NOTE: use the arrow keys to control the snake
+.EXAMPLE
+	PS> ./play-snake.ps1
+.LINK
+	https://github.com/fleschutz/PowerShell
+.NOTES
+	Author: Markus Fleschutz | License: CC0
+#>
+
 $w=($q=($u=$Host.UI.RawUi).WindowSize).Width-1
 $u.CursorSize=0
 $a=0..($q.Height-1)|%{$i=$_;0..$w|%{@{X=$_;Y=$i}}};$s=($f=$n=$a[($x=$y=$d=3)]),$n
@@ -7,4 +21,27 @@ $u.CursorPosition=$c
 	Write-Host $t -N
 }
 
-while(0..$w-contains$x-and($b=$x+$y*($w+1))-ge0-and($n=$a[$b])-and$s-notcontains$n){Z $n X;sleep -M 99;while($u.KeyAvailable-and1..4-contains($k=$u.ReadKey(15).VirtualKeyCode-36)-and$d%2-ne$k%2){$d=$k}switch($d){1{--$x}2{--$y}3{++$x}4{++$y}}$s+=$n;if($s-contains$f){$f=$a|random}else{$p,$s=$s;Z $p ' '}Z $f O}
+while(0..$w-contains$x-and($b=$x+$y*($w+1))-ge0-and($n=$a[$b])-and$s-notcontains$n) {
+	Z $n "X"
+	sleep -M 99
+	while($u.KeyAvailable-and1..4-contains($k=$u.ReadKey(15).VirtualKeyCode-36)-and$d%2-ne$k%2) {
+		$d=$k
+	}
+	switch($d) {
+	1 { --$x }
+	2 { --$y }
+	3 { ++$x }
+	4 { ++$y }
+	}
+	$s+=$n
+	if ($s-contains$f) {
+		$f=$a|random
+	} else {
+		$p,$s=$s
+		Z $p ' '
+	}
+	Z $f "🔶"
+}
+
+Write-Host "`n---------`nGAME OVER`n---------"
+exit 0 # success