So the way I play is with left and right arrows for movement, spacebar for jump. I figured out that for the timing with wall jump orbs it helps to do spacebar and then immediately press the up arrow - I've found it to be a lot more consistent than trying to do two jumps in a row with the same button. I hope this helps!
After I beat it I also found the secret message! I was frustrated with this game at first but then I came to enjoy it :) Once I read about its approach to "bad" game design I had a lot more fun :)
