The objective is to get the ball to the green line with the help of the three portals. Almost all instructions are mentioned in the "tutorial" (It's not really a tutorial) except the fact that you need to line up the ball to the red portal and the blue portal above the green line. The ball only enters the red portal and only comes out of the blue portal. To redo, press k. It will take you back one level.
Please try my other games, I recommend TAG (https://scratch.mit.edu/projects/16989809/) and Don't Touch the Red (https://scratch.mit.edu/projects/26614511/).
