First off - great progress! I am happy to finally get the chance to play the game :)
I will share my initial thoughts, take them for what they are worth.
1. First off, the app icon seems very dark, maybe it is worth bumping up the bright colours here:
2. Loaging screen - the alignment is confusing, I would suggest centering the art by part (both in the screen and the text alignment)
3. I feel like the game could benefit from sounds greatly. There are a bunch of free sounds in several websites like:
https://soundbible.com/royalty-free-sounds-1.html
https://freesound.org/people/Merrick079/sounds/568169/
4. When you create the actual game progression, maybe some subtitle would help make each of the steps more distinguishable. Something like the small phrases in Unravel 2 come in mind. Something as short as "Hounds of Death", "Meet the Reaper", "Face the Death". Just something to give the specific combination of location and opponents a distinctive quality.
That is it for now, good luck :)