The hi-hats and the snare are supposed to be playing around 0:07, but that point of time is only playing double crash cymbals and then silence. You should only let one channel play the crash cymbal (as having them simultaneously play in both channels is unnecessary) and then the occasional snare drum, and let the other channel play the constant [ CLOSED a16 a16 ] loop.
In 0:13, it's supposed to play the [ CLOSED a16 a16 ] loop, but the SPC also only has silence there. There's room for channel 7 to play the [ CLOSED a16 a16 ] loop, so you should add that in. Though in 0:27, I am hearing the hi-hat rhythm from your SPC, but you should have the snare in channel 7 as that channel is empty too at that time.
The closed hat's ADSR decay speed is a bit too long, and the open hat's ADSR decay speed is incredibly fast, it almost seems like you swapped their ADSR values.
0:53 is too early for #6's harps and all of the following notes to start playing, it should be starting after placing a r1
Overall, the main issue is that the timing placements are all over the place mainly in #6.