A very fun, very difficult demo that makes me excited to see the full game! The gameplay is as addictive as any of these kinds of random-result based roguelikes, and there's certainly a lot of depth to be found. The pixel art compliments the gameplay well, and the music is really catchy! (Though it could definitely do with more than two song tracks.)
There are a couple of critiques I have. For one, the option to throw away your equipment/artifacts/whatever you call the stuff that appears on the left of the screen under your stats should probably give the players some coins in exchange. Maybe it's for if you get too many artifacts and need to make some space to buy some more? But artifacts are so expensive in the shop, I was never able to get enough to see if there was an inventory limit. As it stands, the ability to throw away artifacts needs something more to entice players to make the choice.
Also, saving and exiting and reloading a game led to all spells being reset to their original status, meaning that only Charge 1 and Sharpening 1 remain upon reloading. I'm assuming that's just a bug, but it's a pretty nasty one.
Still, this was overall a really fun game. one I could easily find myself playing for hours on end.
TLDR:
Pros: Addictive gameplay, great spritework, lots of mechanical depth under the surface,
some subtle humor within the enemies
Cons: Only two songs, not much point in throwing away artifacts, bug makes saving and
exiting harmful to the player