Base scoring:
The player earns 50 points for each cleared tile + 10 points for each additional tile over 3:

3 tiles cleared = 150 points
4 tiles cleared = 200 + 10 points = 210 points
5 tiles cleared = 250 + 10 + 20 points = 280 points
6 tiles cleared = 300 + 10 + 20 + 30 points = 360 points
7 tiles cleared = 350 + 10 + 20 + 30 + 40 points = 450 points
8 tiles cleared = 550 points
Etc.

Boosts:
Each tile cleared by boosts provides the same amount of points as outlined above.

Multiplier:
The default multiplier equals 1.
Removing the flower provides a +1 multiplier to score for all further moves.