When I get a new fish, I don't even try to feed them until they've been in for 24 hours, they need time to de-stress.
BUT, you've got 2 clowns, a goby, a shrimp and 50 snails in a 10 gallon! :eek1: :eek1: :eek1: :eek1: :eek1: :eek1:
You are already over stocked, watch your ammonia very closely, it may take some time for your tank to adjust to that bioload in such a small system.