Ah, OK, that adds an interesting twist to the gameplay, but it should have been communicated better. The main menu only says "LMouse = shoot" and the windup animation doesn't start up until half a second after you hold down the LMB, so it was really intransparent. Just changing the instruction to "LMouse = shoot (hold to charge)" would fix that.
Anyhow, the game is cute, and has unusual visuals, but it could use some more sounds, especially some cues for when you successfully match 2+ people, miss a shot, or hit a single person, since these things can happen off-screen, leaving you without any feedback. Also, I found the mechanic where the arrow bounces off walls very weird -- it has little gameplay purpose that I've seen, but breaks the "Cupid's arrow" metaphor, since arrows just don't ricochet like that IRL. Lastly, what do the heartbroken blue NPCs do? Just wander around until they disappear, or can they damage the couples you've already brought together?