Can the United States government enforce any laws on Native American reservations?

As I am sitting here watching New Moon don’t judge me I wonder how the legal systems on reservations work. Can the US government enforce laws on the reservations? I know that gambling is legal on tribal lands but are there other things that are illegal in the US that are legal on tribal lands?

Sorry about the shitty details. I really have no idea how to word this question in a less confusing manner. Also, if anyone wants to take issue with my use of “Native American” versus “Indian” please either start a new question or PM me.