Very polished game! The art is amazing and the music and sfx fit the game very well. Good interpretation of the theme and unlike anything I've played before. I would have liked to have keybinds for the abilities (maybe just the number keys) so as to not need the mouse but I appreciate that you made it mobile friendly. The UI is very well designed and I like how obvious it is when the enemies are about to attack, although it would have been nice if there was some indication on the UI of how many enemies were left in a level.
I found the gameplay to be a little bit repetitive. The enemies only spawn from one of 2 locations and the player has very limited options for what they can do after attacking (either breathe in or move). This leads to the player not really having any counterplay options and instead just hoping that there's enough time between enemies to prepare their next attack. For example, I got into a situation where there was a melee enemy right next to me but also a bow enemy far away on the other side so I had no option but to take damage. This isn't too much of a problem because the game is easy enough that taking some damage doesn't really matter but it does leave the player feeling a little powerless.
The tutorial at the start of the game was really well done and I enjoyed having a little bit of a narrative element. I found the font quite difficult to read so that might be worth changing if you develop the game further for general accessibility. It would have been nice if the ending had some kind of dialogue or cut scene too as it felt quite abrupt but I would assume that didn't happen due to time constraints.
Overall a really excellent game and I could definitely see it being made into a very successful mobile game. All of the polish is there already, I just think that the combat could use some small tweaks to make it feel more fair and exciting. Great job!