I'm not feeling the ducking of the kickdrum. I also would suggest you messing with the parameters of the 808 sample because you can do a lot with it to make it really powerful like you would on daws like fl studio. the hi-hats have a lot of high end so I would cut that out with a curve eq. Also not feeling that clap sample, you should choose replace that one with a better one because I feel like it doesn't fit the beat. The 808 here is fine but you should take a reese preset and use that with it
the problem with this one was that i used a really punchy kick and i had to turn the volume down so it wouldnt clip, but then it sounded weak so i had to sidechain it a bunch, but i think if i tweak the waveform on the kick it wont need the sidechain to carry so hard XD
But you can't really do very much with the gravity if you don't mess around with the effect chain settings. for example just leaving it as is won't have any effect. it just will sound like a weak sidechain