My favorite part is the first one where you go down! I think this part is more balanced in terms of gameplay, even though you could expand what you can do by killing the hunters!
The second part is by far the easiest. What do you think about shooting the sunbeams directly at the player to force them to move? Because I always camp out in a corner, and the sun targets me once every 30 seconds.
The last part, where I have to dodge the huge sun, is really hard! Maybe that’s what you’re going for, but compared to the other phases, I found there to be a huge gap in difficulty.
In any case, I love the concept of going back up the entire level after going down!