Brick Breaker Clone on ESP8266 - Webpage Controlled

Started - for another project - to work with an ESP8266 as a webserver... ended with this. This was my first experience with HTML and JavaScript, so the code for/and the webpage are pretty ugly. ;-) But it still works pretty good... except the restart after a game over on mobile. I don't know why, but it starts instantly...I'm not able to choose the difficulty after a restart.

The source code is available on GitHub. You'll need to download two libraries from Adafruit - Links are in the sketch.