Haven't seen anyone use c3RlcG5leQ== as a solution yet. I was just brute forcing it after understanding all the rules. Super fun puzzle!
The physics is actually fantastic, short but extremely sweet!
In case you're wondering about how to get higher scores, the score you get is equal to the area of the selection you make. So you should make as big of an area as possible even if the numbers are close together.
Fun game! The art especially is really cute!