I was really enjoying this for a while, the underwater exploration was very atmospheric and controlled well, and it was always easy to know where I should be going. There were some interesting cutscenes as the character used these old machines to transform, and the camera got a little tight and hard to see at the end, but thanks to the F key the navigation was still simple. A collect sound for the orbs would have been a nice touch to add some player feedback.
The whole thing kind of fell flat at the end, where I was presented with a wall of words and a text entry box and no idea what the game expected of me. I wasn't even given a failure notice on entering the wrong answer that would have helped me be confident that the text recognition was working at all. Ultimately I spent almost 10 minutes trying different answers before giving up in frustration with a sour taste in my mouth.