Hey sorry, I didn't see your message! This one is a tricky one. First hit orange, then you have a choice. You can hit the yellow door, but then you have to hit the bright green on the left. Or alternatively, skip the yellow door after the orange and go straight to the dark green on the top right.
The icons on the top right tell where to go. The flag is the exit, the little arrow tells you which color will start a color change on the level.
Hope that helps! Lemme know :)