The puzzle is interesting XD
It's hard to understand at first. Maybe you can add number in the green and red circle. So the player know that clicking on the vector will put it at the green circle first.
All of the levels is interesting and designed well in my opinion. I like the last level the most. There are many possibilities to put the vectors each time. That makes it hard, but the solution is satisfying XD
The vectors are cute too XD