I think no one have invented a fish arcade game that you can play with your altcoins and bitcoin because the common games that are invented in a gambling site are table card games, slot games, sports bet, lottery, and dice games that these games are mostly played by gamblers in a real casino. It is also better if someone will make a fish arcade game in a gambling site, but i think only few people will play to it because it is not that exciting that it seems.
Yes there is no one as of now, I am very sure that once someone develops a game like that, everyone will try it, because it is a fun game. I hope that a stuffed crawler will be develop in an app as well but the thing is the stuffed toy can be converted into altcoin and the you will deposit there as well using altcoin or bitcoin. I am excited to see new game in the market.