The game
The game asks you once if it can send data about how you play. It sends nothing unless you say yes. You can change your answer at any time on the Data tab in the settings. That tab also shows what is sent and lets you delete it.
If you say yes, the game sends data about how you play (floors, deaths and what killed you, builds, what you spent in town) and replays of the floors you died on. The data is tied to a random ID, not your name, and no IP addresses are kept. I store it on my own server, and it is deleted after two years. I use it to balance the game.
This website
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