Feed Chompy some math. He pays in XP.
Type on your keyboard too — 0–9 + - * / Enter Backspace Esc F fraction M mixed D decimal
Fractions are worked out exactly — 1/3 + 1/3 really is 2/3, never 0.6666666.
Chain answers without a mistake to build a COMBO. Combos multiply your XP and your boss damage.
Chompy evolves at levels 5, 10 and 15. New skins unlock at 3, 6 and 9. Your progress saves automatically.