Thanks! Sadly, I had to abandon adding sounds as I was short on time. But I think I might make the Sentinel make different sound depending on how cautious it's about your presence. And that's a good idea to also give some hints on where he is in relation to you.
And I'm glad you like the flying, it was interesting to implement it and I'm curious to see what can I do with the system I made. I had initial plan on more abilities, dashing seems to be a nice idea, and I was trying focus the game on more stealthy approach, so some abilities that help you with exploration and evasion.