Looks and feels like basically a straight up TinyRogues clone. Except without all the content. Which for a tech demo, the fact that the movement feels as smooth, is a very good thing.
But even the UI looks basically identical to what TinyRogues looked like before their UI bloated into the current monstrosity. So it feels a bit too much like a clone rather than an interpretation in that regards. Usual pet peeve of no outlines on enemy projectiles causing issues with visual clarity once rooms get busy (is that red blob at the corner of my eye an enemy or a projectile?)
I played without sound, which made there be 0 indication of if I got hit. So a visual representation of being hit would be nice. Having to look at my heart in the top left to see if I was hit isn't ideal in a bullet hell game.
Not really being given any indication of what the passive skill you're picking up is/does wasn't great. Maybe there was a way to get tooltips for them? But if so it wasn't intuitive or explained. Most of them seemed basically useless, while the purple orbs of death one was just absolutely destroying enemies.