Thank you! Glad you liked it even with the challenges.
Honestly I was struggling with mapping 6DoF to keyboard controls and this setup felt right for me, but I have no idea how to improve it or how other people prefer it, so suggestions are very welcome :D
Agreed on the challenge of finding the objectives, I should've made this game mechanic more forgiving. I've added a map as a spoiler in the description to give hints on where they are, and you can use the sonar audio pitch to determine if they're above or below you once you're near, but that's all I can do for now to help you without changing the game itself...
Thanks!