Okaay I like the simple approach, it works, its easy to listen to, since you are asking for feedback what I can tell is on the keys, stacked chords on the low registry especialy triads will always sound bad so the trick is to change the voicings example you were playing Bb minor chord very low Bb - Db - F, if you play it an octave higher with Bb then F and an octabe high Db you will spread your chord across the spectrum making it sound huuuuuge. Other tips, quantize your playing a little bit, we can feel some hesitation in the play, it sounds more organic but we can pinpoint more mistakes, quantize around 60 to 70% your MIDI and it will play on time but still feel human. Also last time but its for itch.io , your daw screenshot you can just add it to your project page and it will translate to the submission. well done !