A cool concept for sure, I love the art and you did a great dog with the sword animation. Feels like it has some real kickback when it slams into the ground.
I'm a bit dumb so it took me awhile to realise I need to tap the direction repeatedly to build up power than swing, so you might need to make that more clear.
As soon as the sword swings I would try to start building up power again but the power reset backs to 0 once the animation is done, I think letting you keep charging mid animation would help with a feeling of momentum.
Nice work.