A really great game! And also very challenging considering you are always on the losing side in terms of power. Healing is also rare so once you get hit, you won't regain it in a long time. That's why siphon is probably one of the best abilities in the entire game. With that said, I still haven't won a single run yet lol.
I also like some of the features and polish the game has, such as the run history, the detailed settings even with keybind customization, and how you can hover over the skills in the pause menu and run history to see their descriptions.
When I first played the game, it felt a little bit weird with having the movement be directed by the mouse click. Though as I played it more and more, it made sense since it would be difficult to juggle between movement and skills if both are using the keyboard.
Also, some nitpicks that I saw while playing. When the demon had the Surge ability, it creates the burning circles first before dashing, which caught me offguard so much. Another one is how the demon's movement got blocked by his own shield. Sometimes, when the demon is dashing through the shield, it causes a lot of noise. These are minor though and didn't really affect me that much.
Overall, a solid game with a big potential.