I think Scrumbo captured most of the thoughts that I would share already, but mainly I agree that some more complexity would go a long way. On top of moths that reduce score, maybe something like camera rolls that reload or partially reload your camera instantly when you take a shot of them could also help.
It's also difficult to tell when you're getting credit for a photo and how much credit you're getting - the score counter goes up, but it's not really possible to tell how many points you're getting with each shot as you're playing. It would be great if there were little numbers that came up from each butterfly when you took their picture, so you have some feedback on when you're getting points from each butterfly.
I think that mashing is a bit of an issue here as well, since it felt like the best strategy was pretty much to just click as fast as possible on high-scoring groups, which feels less dynamic. Making butterflies vanish after their picture is taken would alleviate this a lot and make sure the player is moving around more, while also making it much clearer when points are being gained!