Kuomi Sudoku

A new type of Sudoku:
A grid is solved when all top and left cells are green.
A top cell turns into green when its column cell sum equals its value.
A left cell turns into green when its row cell sum equals its value.
Easy?
Yes.

So try next levels:
Additonnal challenge: the top left cell value turns into green when the light blue cell sum equals its value.

Still easy?