Hi, I can't reproduce the issue. What operating system are you using? Can you try with different browsers and check and tell if it works with them? Also update Chrome to the newest version in case you are using an older version.
If nothing works, can you try sending me the console output when the game is stuck at a black screen?
See instructions here: https://stackoverflow.com/a/31059700 (Press F12 in chrome, choose the "Console" tab and right click the list of messages and choose "Save as..." and then save to a file.)
It should most likely contain red error messages. You can send the file to support [at] accidentlyawesome.com and that might allow me to find out what is happening.