You must beat the demon to unlock the next act’s quests and higher level cap.
Leveling up in Shadow Fight 2 is tied directly to winning fights. Instead, you gain XP only by: how to level up in shadow fight 2
This becomes a – you must beat all 6 demons again at progressively higher levels (27, 29, 31, etc., up to 52). Each requires upgraded gear, often forcing coin farming in survival/duels. You must beat the demon to unlock the