I don't have much cryptographic experience--but I've read Applied Cryptography, and if there's one thing I learned from it, it's not to design your own cryptosy

I don't have much cryptographic experience--but I've read Applied Cryptography, and if there's one thing I learned from it, it's not to design your own cryptosystem. Are you sure that this algorithm is secure from cryptanalysis? Have you tested it against differential cryptanalysis, boomerang attacks, et cetera and so forth? Just a few things to keep in mind.