Never heard of this composition software but praise your chord progression and approach to milling those keys through the chords. I would caution to use less reverb but genuinely surprised a mix in audacity sounds this good. If you do this well with it I would recommend trying Reaper, which is much more capable of suiting your needs. Also surprised to hear Wavetable sound this good.
I think the bass could be more centered than it is. It's washing out and causing a low hum wide in each channel. I would also change out your percussion instruments or apply some sort of filtering FX such as sample rate change to soften them to fit the rest of your composition. They feel flat in comparison to the spacious keys, choir, and tubes. Great closing chord, very satisfying.