added oxipng script and optimized EVERYTHING without loss

.gitignore

@@ -7,4 +7,5 @@
 /mods/Week7/
 mods/ModTemplate/
 /mods/CrumbCat/
-/yoshicrafterengine/doc.xml
+/yoshicrafterengine/doc.xml
+oxipng.exe

oxipng.bat

@@ -0,0 +1,4 @@
+@REM Download oxipng from https://github.com/shssoichiro/oxipng/releases/latest, copy it in the root folder of the project, then run this bat file.
+oxipng -r assets/
+oxipng -r mods/
+oxipng -r skins/

source/Main.hx

@@ -33,7 +33,7 @@ class Main extends Sprite
 	var startFullscreen:Bool = false; // Whether to start the game in fullscreen on desktop targets
 
 	// YOSHI ENGINE STUFF
-	public static var engineVer:Array<Int> = [1,7,3];
+	public static var engineVer:Array<Int> = [1,8,0];
 	public static var buildVer:String = "";
 	public static var fps:GameStats;
 
@@ -79,6 +79,12 @@ class Main extends Sprite
 				if (FileSystem.exists("temp.exe")) FileSystem.deleteFile('temp.exe');
 			} catch(e) {
 
+			}
+			try {
+				// in case to prevent crashes
+				if (FileSystem.exists("YoshiEngine.exe")) FileSystem.deleteFile('YoshiEngine.exe');
+			} catch(e) {
+
 			}
 			#if cpp
 			cpp.Lib.print("main");

source/charter/YoshiCrafterCharter.hx

@@ -411,15 +411,15 @@ class YoshiCrafterCharter extends MusicBeatState {
         settingsTab.add(hitsoundsEnabledCheckbox);
 
         hitsoundsBFCheckbox = new FlxUICheckBox(10 + (hitsoundsEnabledCheckbox.width / 2), y, null, null, "For the Player", 105, null, function() {
-            hitsoundsBFEnabled = hitsoundsBFCheckbox.checked;
+            Settings.engineSettings.data.charter_hitsoundsEnabledBF = hitsoundsBFEnabled = hitsoundsBFCheckbox.checked;
             hitsoundsEnabledCheckbox.checked = hitsoundsBFEnabled && hitsoundsDadEnabled;
         });
         hitsoundsBFCheckbox.scrollFactor.set(0, 0);
         hitsoundsBFCheckbox.checked = hitsoundsBFEnabled;
         settingsTab.add(hitsoundsBFCheckbox);
 
         hitsoundsDadCheckbox = new FlxUICheckBox(10, y, null, null, "For the Opponent", 105, null, function() {
-            hitsoundsDadEnabled = hitsoundsDadCheckbox.checked;
+            Settings.engineSettings.data.charter_hitsoundsEnabledGF = hitsoundsDadEnabled = hitsoundsDadCheckbox.checked;
             hitsoundsEnabledCheckbox.checked = hitsoundsBFEnabled && hitsoundsDadEnabled;
         });
         hitsoundsDadCheckbox.scrollFactor.set(0, 0);