Very fun idea, and a very well polished game! Love the little intro cutscene. And the flipchick is a cutie!Congratulations! My main gripes with the game are in the strategic department. I really like the concept of the game, so I want to give you some proper feedback. Here are my notes:
1. First thing I noticed: I couldn't tell from the sprite what way the flipchick was facing. I thought he was facing right when he was actually facing up. This led to my first actions being turning around twice.
2. Coinflips are an interesting idea. Every coin you add having two sides, or a 50/50 of something you might really want to do, and something that is less optimal is fun design. However, having infinite flips just makes that part of the design obsolete. You can always just get the result you want anyway. Furthermore, it becomes more of a chore to flip the coins. If I have all my options available to me at all times anyway, why do I have to jump through hoops to do the action I want? I think you should have maybe stuck with flipping all coins at one time, then choosing your actions from that.
I like the idea of moving the window to flip the coins, but then you can't guarantee that all coins flip once. So I would have probably cut that feature and added a flip button. In my opinion, I think, in this case, preserving good strategy design is more integral to your game than a fun coin flipping mechanic.
3. Defending is way too strong. In a game where you have 5 hearts, getting an extra life whenever you want is super significant. Compare this to Slay the Spire, where a defend card blocks 5 damage (out of 80 hit points) for often only one turn. It was very easy to beat the game because of it.
4. The one dimensional movement can work really well (like in shogun showdown) but I think you will need to play around with attack ranges more, so I would recommend starting with two attacks for different ranges by default.
That's all I got for now. Hope you keep working on this! Good luck!