It is nice when a demo has some sort of vibe going on, and isn't just functional. I like the vibe of this roguelike, as we are some sort of experiment trying to delve deeper underground. It's cool to be able to clock on people and listen to what they say.
UI is functional, but needs bigger fonts, or options to get bigger fonts. The pop-up messages are too fast, and the tooltips are to tiny to be comfortable.
Fights often seem simply unwinnable. It might be just the roguelike aspect but so far out of 6 fights that weren't the starter fight, I've lost 4. Your starter deck is really bad, even if we get a card by selecting one of the three options in the beginnig, and easily win the first fight. Like coming across some robot and a nerd that constantly heal each other, and I cannot damage them enough.
Levels often seem too big compared to the moves you can make, and the character and monsters are a little too tiny as a result.
Maybe some quick buttons would be nice to select cards fast. Like press 4 if I want to use the fourth.
Came across nothing that looks like a bug.