I'm currently stuck at level 8. I do find the solution for it... I tried at least 10 times, but I hope - and will ! - find the way to level 9 :)
Edit: made a small video using the ZX Spectrum port. Enjoy :)
33 isn't a very complicated challenge; it's actually quite simple. I recommend taking a break and coming back to it from time to time. There will come a time when you'll see the solution and be able to solve it. Also, you should practice, because later on you'll face truly complex challenges. Cheer up!