The drag and drop was something I was extremely close to give up on, because it was such a headache to have it even somewhat working as it is now! I mostly managed to wrap my head around it in the end, so I'm positive I can tweak it further ^^
In the next versions flowers won't be scaled down when dragging, and the sprites will be re-centered to be more intuitive, so most of the issues should be solved :D thank you for playing and the nice feedback, we will surely expand/polish the game in the future!