Look in the upper right hand corner of teh game. There is a small NinjaKiwi. There should be a small disk icon. If it’s green, you’re good to go. If it’s other colors, your local game is trying to connect to teh server, wait a bit and it should turn green. If is isn’t there at all you’re not connected to the NinjaKiwi server, so the local game doesn’t know your rank, cash, etc. Wait a bit and try again.
When it finally connects, all your levels will be back. Life will go on.