Puzzle : The Game Part 2

It seems like you liked the first part so that's why you're here :D
This part has to remind you about the "Portal".
And don't pay attention at that error in the left top border. In the second level you will need the plasma gun. You will switch to it automatically.
P. S.: If you want the next part, help me with puzzles' ideas, please. I can't come up with them.