Yo!

You can make one yourself, but some sold on scarce city a while back.

https://scarce.city/auctions/blockwatch-gold

You can make one a lot cheaper with watchy https://watchy.sqfmi.com/ and this repo: https://github.com/coinertime/BLOCKWATCH

A group of us would go to the school computer lab before school started to play this.

No zaps! - "User does not have a lightning address setup to receive sats."