Initial obfuscation/blurring cloak over explore page without entry

[mpothier]

Encourage visitors to contribute a "play" entry prior to viewing the aggregate data. This would prevent recycling of preconceived connections put in their mind by viewing data first.

Suggested implementation:
Semi-opaque, background blur window with message suggesting they "play" first; also give "no thanks" option to continue to the "explore" page anyway.
Window would only appear if visitor doesn't have an entry logged for given option in their browser's localStorage cache.