diff --git a/README.md b/README.md
index aa02f374a..628ec844e 100644
--- a/README.md
+++ b/README.md
@@ -7,6 +7,10 @@ This project uses the following libraries:
 - [TeaVM](https://teavm.org), licensed under the Apache License, Version 2.0.
 - [gdx-teavm](https://github.com/xpenatan/gdx-teavm), licensed under the Apache License, Version 2.0.
 
+## Known errors
+1) No rays effect.
+2) If tome of mastery is not picked up, opened and closed before entering a custom note, then screen goes blank until the player does that.
+
 [Shattered Pixel Dungeon](https://shatteredpixel.com/shatteredpd/) is an open-source traditional roguelike dungeon crawler with randomized levels and enemies, and hundreds of items to collect and use. It's based on the [source code of Pixel Dungeon](https://github.com/00-Evan/pixel-dungeon-gradle), by [Watabou](https://watabou.itch.io/).
 
 Shattered Pixel Dungeon currently compiles for Android, iOS, and Desktop platforms. You can find official releases of the game on:
diff --git a/html/build.gradle b/html/build.gradle
index f4c121809..6af03e682 100644
--- a/html/build.gradle
+++ b/html/build.gradle
@@ -4,6 +4,7 @@ dependencies {
     implementation "com.github.xpenatan.gdx-teavm:backend-web:$gdxTeaVMVersion"
     implementation "com.github.xpenatan.gdx-teavm:gdx-freetype-teavm:$gdxTeaVMVersion"
     implementation "com.badlogicgames.gdx:gdx-freetype:$gdxVersion"
+    implementation "com.github.xpenatan.gdx-teavm:gdx-controllers-teavm:$gdxTeaVMVersion"
     implementation project(':core')
 }