Leveling is a roleplaying aspect dictated by your experience. Your character will start at level 0 which means you are weaker than a baby on stereroids... sort of. Well any way here is a list of levels and how much experience your character needs to level.
Level 0 - Baby - 0Xp
Level 1 - Level 5 human - 10Xp
Level 2 - You even lift - 100Xp
Level 3 - 300Xp
Level 4 - 600Xp
Level 5 - 1000Xp
Level 6 - 1500Xp
Level 7 - Come at me bro - 2100Xp
Level 8 - Wanabe Demi-God - 2800Xp
Level 9 - Alucard - 3600Xp
Level 10 - DnD Level 30 - 4500Xp + Special