It was generally very nice i like it. Shame that probably the coolest animation is... death animation xD But okay, others looked great too, especially dash. Music was also done very well in this game.
However mainly the wall stuck bugalmost breaks the game, I had to restart it like 5 times. I mean in current state you have to be very careful to not get glitch and its actually really fun to dash through the whole map.
I got to the boss, killed it (the hitbox was very wild i felt, i would've made it much smaller). And then the boss was just standing there, the music ended. I understand that this is the end?
Overall quite nice. The only thing that I would focus on in terms of game is make it more metroidvania, as for now there's only like one backtracking for the diamond after getting dash. Other than that the game is fully linear almost.