My experience there hasn't been perfect but so far it the owner has been trying to help me as much as he can. The cell amount going down is a game mechanic that also exists in agar.io, it tells you in the help document I am pretty sure so I don't think you can say that's a scam based on that. I don't think you can really make a game like this provably fair since it's a game of skill.
Agar.io your blob doesn't vanish immediately. Depositing and losing the entire balance within 30 seconds (when you are far and away the largest blob) is a scam. He deletes every comment Ive made in his thread and accuses me of defamation instead of addressing it. He's a scammer.
Actually how is this game works? AFAIK it is like snake games which is we as players control it but if you just deposit and yurns out in 30 secs your balance is gone without anything happened, this must be sure scammed. I think this game is unique but if they manage things like this, I dont think that there will be any player to join or even test it. Btw is there any faucet on that site?