I really like the idea and the card game mechanics (and I'm a sucker for deckbuilder games too), but the game could really use a lot of polish.
Obviously, the graphics are very limited, but not having sound makes the experience feel very flat and much harder to tell what's going on.
Starting the game off with a couple of events before I could even get into one fight is not the best idea, since I had no idea how the game played. Nor is it starting out with a draft for much the same reason: having a tutorial fight before either of those things would help tremendously. When I finally got into the first fight, it was against a boss that just spammed webs, so it was a slow-going and frustrating fight, until I gave up because of boredom.
I think you could have an interesting game if you worked further (much further) on it, and I encourage you to do so!