diff --git a/www/js/interface.js b/www/js/interface.js
index a1f9586..aae13fc 100644
--- a/www/js/interface.js
+++ b/www/js/interface.js
@@ -208,15 +208,19 @@ const INTERFACE = {
     },
 
     click(event) {
+        console.log("CLICK");
         switch(event.button) {
             // Main button
             case 0: {
+                console.log("A");
                 if(INTERFACE_DATA.hover !== null) {
+                    console.log("B");
                     INTERFACE_DATA.clicked = INTERFACE_DATA.hover;
 
                     if(INTERFACE.Ui.match_select(INTERFACE_DATA.hover, INTERFACE_DATA.select)) {
                         INTERFACE_DATA.clicked = null;
                     } else {
+                        console.log("C");
                         // Check if operation can be performed on new tile.
                         // Otherwise, switch selection.
                         let result = 0;
@@ -247,6 +251,7 @@ const INTERFACE = {
                         // Handle player action.
                         switch(result) {
                             case 1: {
+                                console.log("D1");
                                 let source = INTERFACE_DATA.select.source;
                                 if(source == 0 && INTERFACE_DATA.alt_mode) {
                                     source = 3;
@@ -264,6 +269,7 @@ const INTERFACE = {
                             } break;
                         
                             case 0: {
+                                console.log("D2");
                             // Handle new selection.
                                 INTERFACE_DATA.select = null;
                                 INTERFACE_DATA.alt_mode = false;