i only listened to ya_suk.e
i think the lowfi sounds cool
i like the melody aswell
i think the subtle cymbals are great
one thing i think could be better is the snare. it sounds a bit too abrasive to be in a song that almost sounds like techno. i think a calmer snare with less midrange would have worked better
idk but i think another melody or vocals or anything wouldnt work very well here, although im probably spoiled from listening to ambient. im not entirely sure what i would do with this but maybe soft cymbals, a soft pad synth or smth similar could make it work as a longer song