switch back to const for images, palettes can still be changed it seems

apps/waternet/app.js

@@ -1,7 +1,7 @@
 // --------------------------------------------------------------------------------------------------
 // images
 // --------------------------------------------------------------------------------------------------
-let BLOCKTILES = {
+const BLOCKTILES = {
   width: 10,
   height: 10,
   bpp: 2,
@@ -10,7 +10,7 @@ let BLOCKTILES = {
   buffer: require("heatshrink").decompress(atob("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"))
 };
 
-let CONGRATSTILES = {
+const CONGRATSTILES = {
   width: 10,
   height: 10,
   bpp : 2,
@@ -19,7 +19,7 @@ let CONGRATSTILES = {
   buffer: require("heatshrink").decompress(atob("gtUgFQoEFggEFqoJIDAVQDBEQDowTDGIoEBA4IEJGwQTBGJhPHGKAJGGI4YJHYRPIAAQYJihKFgtACYQxCLxK4LAAQfBAwQEQJQkBAgLCBAgzMCDAzbHqJbDAgT5JbZauMgNAqlUgsRoFRigJCqAEIJQlUEQKpBqL+NAATWCCZpSEGIQYLqr5LGKL5GGJxjJDoKpGAQb3DDoRjEWwL5LAg75HAhbgHDCCuHd5b+Cor5KFgy4MGI0AoiNBXoZ8MNAQTBDQI9CGIILBMAR8GADAA=="))
 };
 
-let CONGRATSSCREEN = {
+const CONGRATSSCREEN = {
   width: 160,
   height: 80,
   bpp: 2,
@@ -28,7 +28,7 @@ let CONGRATSSCREEN = {
   buffer : require("heatshrink").decompress(atob("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"))
 };
 
-let SELECTORTILES = {
+const SELECTORTILES = {
   width: 10,
   height: 10,
   bpp: 2,
@@ -37,7 +37,7 @@ let SELECTORTILES = {
   buffer: require("heatshrink").decompress(atob("ACeAgEogEC0AaUhQdGHCozYFSYWCAggApGd9AgEUgEBqAaUgodGHCozYFSYWCAggApGbYA=="))
 };
 
-let TITLE = {
+const TITLE = {
   width: 160,
   height: 50,
   bpp: 2,