Main Theme: I love the GB start up sound effect! This is a simple theme, but has great harmonic character to it with these fun and classic video game chords. I like the use of melody and countermelody and sticking true to classic gameboy music limitations.
Earth Temple: The low tones give a very earthy sound to this. Your melody work so far has been extremely well-done. The melodies have direction, and they often feel like their own little adventures in the call and answer type of style. I like the modulation upward in the B section which adds a little hope to the otherwise somber-sounding music. I also really appreciate that you are not afraid to use silence and add space to your music. That is something that I am still trying to work on in my own music.
Water Temple: The 3/4 or 6/8 feel gives a swaying sensation which works really well for a water theme! I like that you once again used the step upward modulation again, but you took it a step farther (literally!) and went up another step.
Air Temple: You are able to create a floaty/airy vibe by starting with the high melody and contrasting that with the low long tones. The high melody sounds like it is flying high up above! Again you have created such a rich sound and it’s crazy to think you only have 4 channels to work with!
Fire Temple: The use of the percussion gives this a spark and smoke like flair. I like that you mixed it up and used shorter rhythms for your melodies in this one. So far I’m super impressed that you made all of these different themes in such a short amount of time!
Ether Temple: I really like the alternate section at 0:43. The counterlines in the bass pair really nicely with the melody. It makes sense that the epic music should belong to the Ether Temple since that is the place where the frozen time originated!
Ending: Using the triads similarly to the previous track is a good way to add continuity to your soundtrack. I like that you brought back the initial theme here in a slightly different way. The tempo change gives it that sense of finality.
Overall: I was super impressed by all of this! The idea is cool and unique (would love to hear more when your game releases by the way!) and the music also is unique throughout each track but keeps a unified identity. This is some great authentic GameBoy music. Excellent work and thank you for sharing!