I really like the idea of only having one arrow and really timing the right shot and lining up multiple orcs. The art looks really polished too. It is really frustrating to have to get past the orcs with no means of defense and especially if I acutally have hit an orc, it feels like I'm punished for upgrading the penetration because my arrow is further away now. Maybe when you hit the shot, you get it back immediatly or it respawns closer to you. Wall bounce also makes the arrow land very far away and when you hit the boss, he just sits on the arrow and it's hard to get ihm off it. Maybe if the moveset would give more opportunities to dodge the orcs it could make retrieving the arrow more fun without taking away the difficulty. or maybe if the orcs don't perfectly mirror your movments you could feint them.