Track 2 felt a taaad bit too uplifting, I think if it were to interchange between lets say 'Discovery' the tone change would feel kinda jarring. Speaking of 'Discovery', I really liked the chord progression in that track :>
Uhhh, good ost, I think it needed just one more track to feel complete but considering you had pretty much a little over a week (at most) and made 4 tracks it doesn't matter and this is still really impressive :P