I really enjoyed this game. The whole aesthetic with the grayscale hand-drawn tiles is fantastic! Really clever way to handle the tile art and level generation. Combat was also nice with the deterministic system, allowing the player to really strategize with no interference of that cruel RNG. It also made stat upgrades interesting, because each one meant a concrete difference toward how the player could approach each encounter (e.g. a damage upgrade can cut the health lost to certain enemies in half by killing them a turn sooner). Once you memorize which number applies to each stat, the UI is very easy to read at a glance. The simple stat system works great with the deterministic combat system.
The number pad controls were awkward for me, it's the first game I've played that uses a "telephone keypad" orientation instead of what I'm used to using on a computer keyboard or calculator. I wasn't able to play with the number pad on my keyboard due to this. Fortunately the expanded WASD controls were usable, but not ideal.
When you re-enter a floor, all enemies respawn -- I don't know if this is intended or not (could very well be the spooky house you're in). Either way, it does allow the player to re-roll the enemy layout by going back and forth between two floors (and I didn't check, but does this reset treasure chests? could be used to farm if so).
So the biggest issue I came across is that monsters aren't visible on stairs (you can see their damage number but that's it). I actually lost my game on level 8 because I thought combat was over and I started mashing the "wait" command to heal, but instead a bat that was hiding under the adjacent downstair poked me to death before I realized what was going on.
Overall this game was a very pleasant experience due to the hand-drawn aesthetic and the deterministic combat system :)