Amazing work with the mixing at the middle section, you nailed the groovy fell of a classic house track.
The ONLY THING ruining the drops is the obviously loud bass that it's drowning the body of the kick entirely and saturating all the mix. It seems that you made the bass wider by splitting it an octave higher to the right, I'm not a genius of mixing but I think that would work better with something such as chord stack.

Pretty average.
It's a nice techno tune but aside from the bell synth it lacks some lead synth to layer with the chord progression. The arpeggio that goes after the first minute sounds cool but wish it sounded louder. As opposite with the hihat, seems a bit louder than the rest of drums. So my point is it needs a bit more balance and another score to fill those empty bars around 1:10-2:00

About the cracking noise, I can't help much cause I haven't experienced any cracking sound when exporting a song ever, try by boosting the buffer lenght on your audio driver, but it could be cause by another factors such as your FL Studio's audio settings or your export settings if you only hear it once it has been exported. Check those and look up some forums or tutorials.

Está muy mal que acabo de descubrir esto después de 6 años. Es lo más bonito que me han dedicado <3