Character controller: There is no modular height control for the jumping and no grace jump. Fortunately there aren't many precision jumping situations, so this isn't a big deal. However, jumping is suffering from inconsistent reading of input. I think you put your input control in the FixedUpdate() loop. This is a problem, because this loop runs at a constant and relatively infrequent way. For all input you need to use Update(). Then when you have the input, you can use that information in FixedUpdate() instead.
Towards the center of the map, there is a platform that cannot be seen at all, so you have to take a leap of faith there. I died there once and I definitely felt like I wasn't in control of the situation. At least I respawned at the feet of the mountain and not at the start of the level.
The ending of the game, which restarts the game, basically, is a little underwhelming.
I liked the dialogue as I walked across the stage. It enticed me to find what would be on the other side.
Graphics: I think the graphics are too simple. I did like the trail though.
Audio: I didn't hear any audio.
Theme: I don't think you've hit it. I didn't see the game lying in any way other than the title, arguably.
Viewing post in Just an Empty Cliff jam comments
Thank you so much for your helpful feedback. Unfortunately I did not have as much time as I would of wanted to make the game which did lead to a lot of sacrifices but in the end I really just wanted to prove to myself that I was able to push beyond the time limits I had pushed myself into and make something for the jam.