Hi guys, lovely job with the concept and illustration!! I didn't know at first that you have to use the up arrow key to pick up the friend, so I was walking around very stuck. I had to use some clues you list above here to get to the next scene.
Something that happened in my play:
In the next scene, as you use different alphabet keys as the platform, I felt that I should press those particular keys as I go on the platforms. However, I don't think there's any penalty for not pressing those specific keys so maybe you want to make that more clear.
Also I'm sharing screenshot below, but I tried enter with the friend picked up, but didn't go to the next scene.
Good work :)