Beautiful game! I tried playing alone and it was too hard. I did see the tutorial at the bottom of the page before I started playing and that helped. Playing with my partner was easier but still really tough. I think it would help to know how many bullets you have left for each character and I think aiming can get a bit frustrating. It was not always clear which character was firing in which direction, maybe it needs to be more obvious where the bullets are coming from or the characters need more contrast between them.