Contact
One person makes this, and email is the way to reach them.
Write to
Bugs, ideas for a game, or just to say something you liked. There is no form and no chatbot. It goes to Turhan Ergene.
If a game breaks
Say which game, what you were doing, and what device and browser you are on. “Skip Stone is black on my phone” is enough to start with, and a screenshot helps more than a paragraph.
Somewhere else
More of what Turhan Ergene makes is at turhanergene.com.