diff --git a/www/data/images/program_img/image_06.png b/www/data/images/program_img/CannonConquest_13.png
similarity index 100%
rename from www/data/images/program_img/image_06.png
rename to www/data/images/program_img/CannonConquest_13.png
diff --git a/www/data/images/program_img/CanvasCellSim.png b/www/data/images/program_img/CanvasCellSim.png
new file mode 100644
index 0000000..a520910
Binary files /dev/null and b/www/data/images/program_img/CanvasCellSim.png differ
diff --git a/www/internals/modules/programs.php b/www/internals/modules/programs.php
index cbffcfb..f1c6074 100644
--- a/www/internals/modules/programs.php
+++ b/www/internals/modules/programs.php
@@ -223,7 +223,7 @@ class Programs implements IWebsiteModule
 
 			if (strpos($prog['internal_name'], ' ') !== FALSE) return ['result'=>'err', 'message' => 'Internal name contains spaces ' . $prog['name']];
 
-			foreach (explode('|', $prog['ui_language']) as $lang) if ($this->convertLanguageToFlag($lang) === null) return ['result'=>'err', 'message' => 'Unknown ui-lang ' . $prog['name']];
+			foreach (explode_allow_empty('|', $prog['ui_language']) as $lang) if ($this->convertLanguageToFlag($lang) === null) return ['result'=>'err', 'message' => 'Unknown ui-lang ' . $prog['name']];
 
 			if (!in_array($prog['prog_language'], self::PROG_LANGS)) return ['result'=>'err', 'message' => 'Unknown prog-lang ' . $prog['name']];
 
diff --git a/www/internals/utils.php b/www/internals/utils.php
index cb966c6..e6bfd0b 100644
--- a/www/internals/utils.php
+++ b/www/internals/utils.php
@@ -288,3 +288,7 @@ function array_last(array $arr)
 	return $arr[count($arr)-1];
 }
 
+function explode_allow_empty(string $separator, string $str): array {
+	if ($str === '') return [];
+	return explode($separator, $str);
+}
diff --git a/www/pages/programs_list.php b/www/pages/programs_list.php
index e337c78..a62813a 100644
--- a/www/pages/programs_list.php
+++ b/www/pages/programs_list.php
@@ -28,7 +28,7 @@ $allprograms = $SITE->modules->Programs()->listAllNewestFirst($filter);
 	foreach ($allprograms as $prog)
 	{
 		$uilang = '';
-		foreach (explode('|', $prog['ui_language']) as $lang) $uilang .= '<img src="' . $SITE->modules->Programs()->convertLanguageToFlag($lang).'" alt="'.$lang.'" />';
+		foreach (explode_allow_empty('|', $prog['ui_language']) as $lang) $uilang .= '<img src="' . $SITE->modules->Programs()->convertLanguageToFlag($lang).'" alt="'.$lang.'" />';
 
 		echo '<a class="prgl_elem" href="'.$prog['url'].'">';
 		echo '  <div class="prgl_elem_left">';
diff --git a/www/pages/programs_view.php b/www/pages/programs_view.php
index 20f3820..b725b7b 100644
--- a/www/pages/programs_view.php
+++ b/www/pages/programs_view.php
@@ -61,7 +61,7 @@ $FRAME_OPTIONS->activeHeader = 'programs';
 
                 <div class="prgv_right_comb prgv_right_lang" style="grid-row:8">
 					<?php
-					foreach (explode('|', $prog['ui_language']) as $lang)
+					foreach (explode_allow_empty('|', $prog['ui_language']) as $lang)
 					{
 						echo '<img src="'.$SITE->modules->Programs()->convertLanguageToFlag($lang).'" title="'.$lang.'" alt="'.$lang[0].'" />' . "\n";
 					}
diff --git a/www/statics/programs/CanvasCellSim_description.md b/www/statics/programs/CanvasCellSim_description.md
new file mode 100644
index 0000000..a97d21c
--- /dev/null
+++ b/www/statics/programs/CanvasCellSim_description.md
@@ -0,0 +1,28 @@
+CanvasCellSim
+=============
+
+Simulate a cellular automata and render it onto a canvas.
+
+Contains a bunch of example configurations in `ccs_examples.ts` but can be freely configured with a custom transitioning function.
+
+**See [the the github page](https://mikescher.github.io/CanvasCellSim/) for examples**
+
+Included Examples:
+- Game of Life
+- Game of Life (with decay)
+- Forest Fire
+- Spiders and Mosquitoes
+- Cyclic
+- Pobalistic Cyclic
+- Caves
+- Mazes1
+- Mazes2
+- Seed
+- Seed (with decay)
+- Generic Lifelike (configure via [RuleString](https://www.conwaylife.com/wiki/Rulestring) or [RuleInteger](https://www.conwaylife.com/wiki/Rule_integer))
+
+Support for
+- resizing canvas
+- wrapping or clamping edges
+- Moore or Neumann neigbourhoods (or custom transitioning)
+- performant drawing (cache colors and only render changes)
\ No newline at end of file
diff --git a/www/statics/programs/__all.php b/www/statics/programs/__all.php
index fe00de5..601e3f1 100644
--- a/www/statics/programs/__all.php
+++ b/www/statics/programs/__all.php
@@ -607,7 +607,8 @@ return
 			[
 				'CannonConquest_01.webm', 'CannonConquest_02.png', 'CannonConquest_03.png', 'CannonConquest_04.png',
 				'CannonConquest_05.png',  'CannonConquest_06.png', 'CannonConquest_07.png', 'CannonConquest_08.png',
-				'CannonConquest_09.png',  'CannonConquest_10.png', 'CannonConquest_11.png', 'CannonConquest_12.png'
+				'CannonConquest_09.png',  'CannonConquest_10.png', 'CannonConquest_11.png', 'CannonConquest_12.png',
+				'CannonConquest_13.png'
 			],
 	],
 
@@ -712,4 +713,23 @@ return
 				'youtube-dl-viewer_09.png',
 			],
 	],
+
+
+	[
+		'name'              => 'CanvasCellSim',
+		'internal_name'     => 'CanvasCellSim',
+		'internal_name_alt' => null,
+		'category'          => 'Simulation',
+		'stars'             => 3,
+		'ui_language'       => '',
+		'prog_language'     => 'Typescript',
+		'short_description' => 'Render a cellular automata via javascript onto an HTML5 canvas',
+		'add_date'          => '2020-12-21',
+		'license'           => 'MIT',
+		'urls'              =>
+			[
+				'github'         => 'https://github.com/Mikescher/CanvasCellSim',
+				'homepage'       => 'https://mikescher.github.io/CanvasCellSim/',
+			],
+	],
 ];
\ No newline at end of file