added result screens

fixed bug about picking up two boosts crashing the game

src/characters.cc

@@ -37,7 +37,7 @@ void character::insert_effect(std::unique_ptr<potion> effect) {
         effects.push_back(std::move(effect));
 
         for (int i = effects.size() - 1; i > 0 &&
-             effect->get_priority() < effects[i - 1]->get_priority(); --i)
+             effects[i]->get_priority() < effects[i - 1]->get_priority(); --i)
                 std::swap(effects[i], effects[i - 1]);
 }