This dish is medium spicy. If you like your food quite spicy, increase the amount of sweet chili sauce (it's called "sweet" but it's got a fair amount of heat) and decrease the honey in proportion. If you like dishes with LOTS of heat, add a few teaspoons of Sriracha sauce to the sauce ingredients.
If, on the other hand, you don't like things spicy at all, decrease the sweet chili sauce and increase the honey. Just keep the same total amount.