Finally, temperament traits are not a reliable way to determine breed ancestry... lots of cats love water, are playful, like to jump high, etc. Most cats are not any particular breed, and are also not mixes of breeds.
He is adorable! How old did they say he is now? He's obviously older than 5 weeks.
I would describe your kitten as a very cute brown mackerel tabby domestic shorthair! I am not seeing evidence of Bengal breed ancestry in your cat. I see that you took a picture of his belly spots... lots of people are confused by these spots, however spots on the belly are a normal part of the pattern for mackerel and classic tabby cats. It is also normal for some of a cat's mackerel tabby stripes to be broken up into spots. This doesn't indicate ancestry from a spotted breed. Brown tabby cats normally have black paw pads. It is normal for cats to have longer back legs than front legs, and kittens often have big paws
