Very fun and interesting concept! I really like the flipping mechanic because it can really help with the issue of drawing cards at the wrong time in deckbuilders, it allows you to always play something meaningful and attempt to salvage every battle even when you get bad rng. I'd totally play a full release, and think it would be really cool to go more in-depth on the flipping/power mechanics if you ever do a full version to create even more interesting and unique decisions.