Cool game! I played Totem and really enjoyed it, and I'm planning on playing your other game soon too. I came back a few times and progressed further and further each time before eventually unlocking both endings. The more I was in this world, the more I grew to love every bit of it! I can't wait to see what you do next!!
Potential spoilers below:
I do have some constructive feedback though. It would have been nice to have a way to replay the messages from the voice. In Totem, you had that on the pause screen. You need something similar here or even better possibly interacting with the radio could replay the message. A few times I was searching for a very long time, and I started to forget exactly what the voice had said.
Secondly, the boundaries that trigger events should be refined a bit. For example, on my first playthrough, I was confused what "my side" of the lake was on because I walked to the far side of the island. I then walked on land, ended up by the dead trees in the water and accidenlty triggered the alternate ending progression. The problem was that it didn't trigger the initial items so I couldn't figure out what to do. I watched one of the playthroughs posted on here and figured it out, but it would be nice if you moved the "you're going the wrong way" message to the little inlets to make it very clear where you're not supposed to go. It would have also been nice to have a message stating that the land is off-limits or something. I spent some time looking on land first for the items before reading a comment saying everything is in the water.
Once I figured it out though, the game was great! Loved the ending. It was an incredible reveal! Hope you don't mind the super long post. Just wanted to give my full feedback!