Its nothing special, just a generic supersaw (most likely 3xOsc). If you understand the basics of a supersaw, then keep tweaking things to try and find the exact sound.

The only things I will add is that firstly, this supersaw sounds like it has a white noise top layer to give it some hiss. It's also very bright, so maybe EQ sweeping around the top end to see if a simple spike helps give you the sound.

Sidechain can be done in a few ways. The most common two are volume automation and compression. If it's done with compression, then the level of 'ducking' is controlled by all the knobs on a compressor: so attack, release, ratio and threshold.

In as small amount of words possible, Sidechain is the process of using the output of one track to control the action of a compressor on a completely different track.

In more Lehmann's terms, if you have something to trigger the sidechain (a kick, snare, synth, ANYTHING), whenever that trigger is hit/played, a compressor will affect another track.

For example, its most common usage is the kick/sub bass combo. A kick's main frequencies are between 80-120Hz (depending on the kick), and a sub bass is usually between 30-80Hz. Therefore, if both play at the same time you will have a clash. Usually it results in distortion, clipping, and all round shittyness. So, if you add a compressor to the sub bass, switch on the sidechain function, then make the kick drum the trigger, you will have the sub bass 'ducking' every time the kick hits. The sub bass will compress down (depending on the compressors settings) to make room for the kick so that there is no clash of frequencies.

There are plenty of other uses for it as well. E.g. reverb ducking on synths, pumping feeling, vibrato effect. I wont bore you with those though 

  Haha! Brilliant

I second that. The drums sound fine, I dont think they're your issue

the really interesting thing that'll come out of this is where there are still gaps in the market

Has anyone got any tunes they know of that are completely unique to them? As in, you cannot think of a genre it would fit into and it's style is completely different to everything you've ever heard?

I'm a sucker for awesome originality yo

your intro chords make me feel some type _{of way} 

I second this. A couple of tears may have been shed...

I just can't not love a constant string high in the background. That shit my jam.