Get ready for a long tip.
First of all, I really like this game.
The tip to skip level 28 and 29 i had a hard time doing it. I can't spoil it in the comments!
Second of all, in Newgrounds, ts secret. Only jay3332 (in Newgrounds: ChoLegend) and hellabro know this trick, but I hhe fullscreen is not laggy.
On light orange levels, prepare to press r by letting it rest on the key. If you're about to die, immediately press it (you need to be fast) to restart like the light orange is water. Otherwise, you will have to start all over.
If you managed to complete all these levels, you're pretty good!
If you struggled on the light orange levels and had to start over, then practice makes perfect.
Third, I asked ChoLegend if he can port this in Newgrounds. He kinda agreed.
Have fun and prepare to rage.