Yeah it's not good.
I played until the first boss, only killed him beause he glitched on the wall and stopped attacking, and even then it took ages to kill him. Im guessing you're supposed to try killing him at lv 20? i only got to lv 13 and started skipping all enemies.
Every lv up you gain the option to choose an upgrade, but they seem overall very bad, like 1% chance to proc the skill even if you somehow manage to lv it up every time, its not good. The best thing is to get more attack because later on every enemy will get armor, making you deal after the first boss, only 3 damage to every enemy.
Yeah the art is good, but it feels lacking since this game feels like it was inspired by thornsin, which is better in every single way
Also the game is very janky, other reviews have already commented on this so i won't say further