const int INV_TYPE_ROUND = 0; // round-based waves of enemies
const int INV_TYPE_HUNT = 1; // clear the map of placed enemies
const int INV_TYPE_STAGE = 2; // reach the end of the level
const int INV_TYPE_ROUND = 0; // round-based waves of enemies
const int INV_TYPE_HUNT = 1; // clear the map of placed enemies
const int INV_TYPE_STAGE = 2; // reach the end of the level