The chimes are a bit weird, but other than that, I really enjoyed this. The stereo effects are great, mixing is on point, and other than the chimes (they sound a bit too detuned, to the point of being almost off-key), your synth selection is pleasing to the ear. And like you stated in the OP, the piece gets more energetic later on. Nice combination of the two (very different) themes of Lava Reef.
Edit: because of your awesome mix, you've inspired me to make one myself. Thanks for that!