Admit it, that's a trick question to get us to listen to your song smile
That's a really good song, full of energy and with a very catchy chorus.
Just this tremolo guitar and how you use the synth pad alone make it already worth listening to.
Excellent!

If you _really_ insist of having a nitpicking feedback, it would be the tremolo guitar (which, together with the vocals, is actually the best part of this song), but it has to fight too much with the drums, bass, and vocals in the center.
I wouldn't put the tremolo directly on the guitar, but rather send the guitar sound to an FX channel where the tremolo is added, and pan the guitar to 1 o'clock and the FX channel with the tremolo to 11 o'clock (or even a bit wider).
The FX channel probably needs a delay (approx. 30 ms) and some EQ to improve the separation of the two channels.

But that's really nitpicking because you asked for it grin