READ ALL INSTRUCTIONS BEFORE, AND WHILE, PLAYING In the opening cutscene, Z to advance text, and F to skip it. You can only spawn in the green-tinted areas. Arrow keys to move. K to shoot a blue "In" portal, and L to shoot an orange "Out" portal at your mouse. Try to get to the yellow portal. In Level 5, you can shoot the orange portal into the yellow portal.
Honestly, the sound effects took like... 10 minutes because I made them all myself. Koji Kondo for "Puzzle Plank Galaxy" music. I might add more levels, but level design in this game is really a pain in the neck... look inside and you'll see what I mean.
