diff --git a/src/gtkballs.c b/src/gtkballs.c
index f0bee44..1c10c4c 100644
--- a/src/gtkballs.c
+++ b/src/gtkballs.c
@@ -24,161 +24,166 @@
 #include "mainwin.h"
 
 gint destroy_lines(gboolean count_score) {
-        gint i = game_destroy_lines(count_score);
-	if(count_score && i) {
-        	gint ml = rules_get_destroy();
-                gint sc = game_get_score();
-                gint nsc = sc + ml * 2 + (i - ml) * (i - ml) * 2 + (1 - pref_get_show_next_colors());
-	  	mw_set_user_score(nsc);
-	}
-	draw_board();
-        return i;
+   gint i = game_destroy_lines(count_score);
+   if (count_score && i) {
+      gint ml = rules_get_destroy();
+      gint sc = game_get_score();
+      gint nsc = sc + ml * 2 + (i - ml) * (i - ml) * 2 + (1 - pref_get_show_next_colors());
+      mw_set_user_score(nsc);
+   }
+   draw_board();
+   return i;
 }
 
 void undo_move(GtkWidget *widget, gpointer data) {
-        game_restore_state_from_undo();
-        stop_jumping_animation();
-        mw_set_hi_score(game_get_hi_score());
-        mw_set_user_score(game_get_score());
-        menu_set_sensitive_undo(FALSE);
-        draw_board();
-        draw_next_balls();
+   game_restore_state_from_undo();
+   stop_jumping_animation();
+   mw_set_hi_score(game_get_hi_score());
+   mw_set_user_score(game_get_score());
+   menu_set_sensitive_undo(FALSE);
+   draw_board();
+   draw_next_balls();
 }
 
 gint random_color(void) {
-        return (gint)(((gfloat)rules_get_colors()) * rand() / (RAND_MAX + 1.0));
+   return (gint)(((gfloat)rules_get_colors()) * rand() / (RAND_MAX + 1.0));
 }
 
 gint random_cell(void) {
-        return (gint)(((gfloat)rules_get_width() * rules_get_height()) * rand() / (RAND_MAX + 1.0));
+   return (gint)(((gfloat)rules_get_width() * rules_get_height()) * rand() / (RAND_MAX + 1.0));
 }
 
-void new_turn(gint number, gboolean first) {
-  	gint i, k = 0, free_cells_number, c;
-	struct score_board scoreboard[10];
+void new_turn(gint number, gboolean first)
+{
+   gint i, k = 0, free_cells_number, c;
+   struct score_board scoreboard[10];
 
-        do {
-		timer_start();
+   do {
+      timer_start();
 
-	  	k = 0;
-        	if(number < rules_get_next()) {
-                	number = rules_get_next();
-	        }
+      k = 0;
+      if (number < rules_get_next()) {
+         number = rules_get_next();
+      }
 
-  		if((free_cells_number = game_count_free_cells()) <= number) {
-  			if(!read_score(scoreboard, NULL, NULL) ||
-			   game_get_score() > scoreboard[9].score) {
-				input_name_dialog();
-	                }
-		      	new_game();
-    			return;
-	        }
+      if ((free_cells_number = game_count_free_cells()) <= number) {
+         if (!read_score(scoreboard, NULL, NULL) ||
+            game_get_score() > scoreboard[9].score) {
+            input_name_dialog();
+         }
+         new_game();
+         return;
+      }
 
-  		do {
-      			i = random_cell();
-	      		if(board_get_at_node(i) < 1) {
-        	                if(first) {
-                                        c = 1 + random_color();
-                                        board_set_at_node(i, c);
-                        	} else {
-                                        board_set_at_node(i, next_get(k));
-	                        }
-		  		k++;
-			} else {
-				continue;
-	                }
-      			/* I hope that k!=0 */
-                	if(k <= rules_get_next()) {
-                                next_set(k - 1, 1 + random_color());
-	                }
-    		} while(k < ((number < free_cells_number) ? number : free_cells_number));
+      do {
+         i = random_cell();
+         if (board_get_at_node(i) < 1) {
+            if (first) {
+               c = 1 + random_color();
+               board_set_at_node(i, c);
+            } else {
+               board_set_at_node(i, next_get(k));
+            }
+            k++;
+         } else {
+            continue;
+         }
+         /* I hope that k!=0 */
+         if (k <= rules_get_next()) {
+            next_set(k - 1, 1 + random_color());
+         }
+      } while (k < ((number < free_cells_number) ? number : free_cells_number));
 
-                if(!first) {
-	        	draw_next_balls();
-			/* if line complete, don't increase user's score--it's not his merit */
-			destroy_lines(FALSE);
-                }
-        } while((free_cells_number = game_count_free_cells()) == rules_get_width() * rules_get_height());
+      if (!first) {
+         draw_next_balls();
+         /* if line complete, don't increase user's score--it's not his merit */
+         destroy_lines(FALSE);
+      }
+   } while ((free_cells_number = game_count_free_cells()) == rules_get_width() * rules_get_height());
 }
 
-void new_game(void){
-	stop_jumping_animation();
-        game_init_game(NULL, NULL);
-        menu_set_sensitive_undo(FALSE);
-  	new_turn(rules_get_destroy(), TRUE);
-        mw_set_user_score(0);
-        draw_next_balls();
-        draw_board();
+void new_game(void)
+{
+   stop_jumping_animation();
+   game_init_game(NULL, NULL);
+   menu_set_sensitive_undo(FALSE);
+   new_turn(rules_get_destroy(), TRUE);
+   mw_set_user_score(0);
+   draw_next_balls();
+   draw_board();
 }
 
-int main(int argc, char **argv) {
-  	gint i;
-        struct timeval tv;
-	struct timezone tz;
-        struct score_board scoreboard[10];
-        gchar *err, *mapfile;
 
-        /* setup all i18n stuff */
+int main(int argc, char **argv)
+{
+   gint i;
+   struct timeval tv;
+   struct timezone tz;
+   struct score_board scoreboard[10];
+   gchar *err, *mapfile;
+
+   /* setup all i18n stuff */
 #ifdef ENABLE_NLS
-  	bindtextdomain (PACKAGE, LOCALEDIR);
-  	textdomain (PACKAGE);
-        bind_textdomain_codeset(PACKAGE, "UTF8");
+   bindtextdomain (PACKAGE, LOCALEDIR);
+   textdomain (PACKAGE);
+   bind_textdomain_codeset(PACKAGE, "UTF8");
 #endif /* ENABLE_NLS */
 
-        /* drop privileges after spawning child with extra privs */
-        if(score_setup() == -1) return 1;
-        setregid(getgid(), getgid());
+   /* drop privileges after spawning child with extra privs */
+   if (score_setup() == -1)
+      return 1;
+   setregid(getgid(), getgid());
 
-  	/* initialize random seed */
-        gettimeofday(&tv, &tz);
-  	srand((unsigned int)tv.tv_usec);
+   /* initialize random seed */
+   gettimeofday(&tv, &tz);
+   srand((unsigned int)tv.tv_usec);
 
-  	/* load user's preferences */
-  	load_preferences();
+   /* load user's preferences */
+   load_preferences();
 
-        /* initialize gtk */
-  	gtk_init(&argc, &argv);
+   /* initialize gtk */
+   gtk_init (&argc, &argv);
 
-        /* load theme, fallback to default if specifed theme cannot be loaded */
-  	if(!(i = load_theme(pref_get_theme_name()))) {
-                if(strcmp(pref_get_theme_name(), pref_get_default_theme_name()) != 0) {
-                        err = g_strdup_printf(_("Failed loading theme \"%s\"! Trying \"%s\"\n"), pref_get_theme_name(), pref_get_default_theme_name());
-                	ut_simple_message_box(err);
-                        g_free(err);
-                        pref_set_theme_name(pref_get_default_theme_name());
-  			i = load_theme(pref_get_theme_name());
-                }
-                if(!i) {
-                        err = g_strdup_printf(_("Failed loading theme \"%s\"! Exiting.\n"), pref_get_theme_name());
-                	ut_simple_message_box(err);
-                        g_free(err);
-                        return 1;
-                }
-  	}
+   /* load theme, fallback to default if specifed theme cannot be loaded */
+   if (!(i = load_theme(pref_get_theme_name()))) {
+      if (strcmp(pref_get_theme_name(), pref_get_default_theme_name()) != 0) {
+         err = g_strdup_printf(_("Failed loading theme \"%s\"! Trying \"%s\"\n"), pref_get_theme_name(), pref_get_default_theme_name());
+         ut_simple_message_box(err);
+         g_free(err);
+         pref_set_theme_name(pref_get_default_theme_name());
+         i = load_theme(pref_get_theme_name());
+      }
+      if (!i) {
+         err = g_strdup_printf(_("Failed loading theme \"%s\"! Exiting.\n"), pref_get_theme_name());
+         ut_simple_message_box(err);
+         g_free(err);
+         return 1;
+      }
+   }
 
-        /* create main application window */
-        mw_create(rules_get_width() * theme_get_width(), rules_get_height() * theme_get_height());
+   /* create main application window */
+   mw_create(rules_get_width() * theme_get_width(), rules_get_height() * theme_get_height());
 
-        /* initialize and start new game */
-        game_init_game(NULL, NULL);
-  	new_turn(rules_get_destroy(), TRUE);
-        remake_board(-1, 1);
+   /* initialize and start new game */
+   game_init_game(NULL, NULL);
+   new_turn(rules_get_destroy(), TRUE);
+   remake_board(-1, 1);
 
-        /* read and set scores */
-  	if(!read_score(scoreboard, NULL, NULL)) {
-                ut_simple_message_box(_("Unable to read score.\n"));
-    	}
-  	mw_set_hi_score(scoreboard[0].score);
-  	mw_set_user_score(0);
+   /* read and set scores */
+   if (!read_score(scoreboard, NULL, NULL)) {
+      ut_simple_message_box(_("Unable to read score.\n"));
+   }
+   mw_set_hi_score(scoreboard[0].score);
+   mw_set_user_score(0);
 
-        mapfile = g_strconcat(getenv("HOME"), G_DIR_SEPARATOR_S, ".gtkballs",
-                              G_DIR_SEPARATOR_S, "accel.map", NULL);
-	gtk_accel_map_load(mapfile);
+   mapfile = g_strconcat(getenv("HOME"), G_DIR_SEPARATOR_S, ".gtkballs",
+                         G_DIR_SEPARATOR_S, "accel.map", NULL);
+   gtk_accel_map_load (mapfile);
 
-        /* enter main application loop */
-  	gtk_main();
+   /* enter main application loop */
+   gtk_main();
 
-	gtk_accel_map_save(mapfile);
+   gtk_accel_map_save (mapfile);
 
-  	return 0;
+   return 0;
 }