Yeah, the point system was somewhat last-minute (or last-day to be more precise haha), so I didn't have enough time to implement anything good enough and went with this 'lazy' solution.
The initial idea was that you aim for low points, and each emitter used adds one point - this would be the ideal score system for me, you'd be able to freely reset a level to try to use the least emitters possible. The issue is that the leaderboard framework was wired to have high scores first, and aiming for lowest points possible is not as intuititive, so I'd need to think of ways to make this explicit. In the end I choose to adopt this worse scoring system for the sake of time