Fun game!
I'm not sure that I can give much feedback on the mechanics. This is an established genre with a lot of expectations about what makes a good game, both in terms of the combat and the rogue-like mechanics. I'm not familiar enough with the genre to know where the game is meeting those expectations.
I agree with Frosi GameArt's comment about not knowing what was hitting me, or even that I was being hit. I died a couple of times without realising that my health was that low.
I thought the tutorialization was really good, except the dodge roll. I think that was missing, but it was where I expected it to be.
I also really liked the progression with the merging elements.
The elemental effects looked cool and felt satisfying.