Covering Ground: This has all the nostalgia of Super Mario World from the SNES. This track feels ready to be placed in a game as is right now! I like the slowed section. That jazzy organ is spicy! Great attention to musical structure; this is ready to loop forever without getting tiring.
Covering Underground: You kept the same great style of the first, made it minor and made it lower, and boom! It’s a hit underworld theme! For this one, I see lots of similarities to the map theme for the first world in Super Mario Bros 3 - love the nostalgia factor you are bringing out!
Bonus Ground: This is awesome as a bonus stage theme. I’m feeling lucky just listening to this at it climbs the scale!
Covering Seaground: Love this chord progression. Your choice of 3/4 time and the instruments you chose make it so this tune can exist nowhere but a water level. Definitely a favorite of mine from your OST!
Enough Ground: This is a very well-written melody. It has a great phrasing and is very satisfying when listening all the way through. I like it in the music box first and then reorchestrated for strings.
Home Ground: This has a very conclusive feeling to it without being cliche. Love the playful tranquility and the upper extensions on that last chord.
Overall: This is such a great OST that is ready for a game right now! I have so much nostalgia from playing SNES games as a kid listening to this. It fits right in with some of the classic greats. Great work and thank you for sharing!