Below is the rewards and rank that you will get when your level up:

Lv1

lv31

lv2

lv32

lv3

lv33

lv4

lv34

lv5

lv35

lv6

lv36

lv7

lv37

lv8

lv38

lv9

lv39

a lv10

a lv40

lv11

lv41

lv12

lv42

lv13

lv43

lv14

lv44

lv15

lv45

lv16

lv46

lv17

lv47

lv18

lv48

lv19

lv49

a lv20

a lv50

lv21

lv51

lv22

lv52

lv23

lv53

lv24

lv54

lv25

a lv55

lv26

lv56

lv27

lv57

lv28

lv58

lv29

lv59

a lv30

a lv60