Wow, this has a lot of really cool ideas, only held back by the various bugs that show up (text gets misaligned and unable to be read, cards are sometimes frozen / unable to be clicked, etc.). But yeah there are lots of neat mechanics (I especially love that you can draw your character, which is something I feel like more flowlab games should try to have)
I played as the blue side (I forget what it's called, sorry) so I'm guessing that boosted my defense significantly because---wow, by the time I got to around floor 20-21, I was absolutely destroying the enemies, frequently going above 1000 defense and 100-150 attack. I'm not entirely sure I understood how the action system works or why there are 2 sets of numbers for your attack and defense (if you want to explain it a bit perhaps?), all I know is you can (at least as blue) click defense pretty much the entire time and win each time.
I like the idea of the medallions too, though what they did seemed to change from how they were described in the store for some reason? Also I couldn't figure out how to properly remove just the ones I wanted and was stuck removing the one on the end most of the time.
Also I would have loved to see more actual meaning behind the order/location of cards you choose to turn over (more stuff like the medallions that double power gained for a certain row; maybe have it be where if you turn over certain adjacent cards they interact in special ways? Also having some kind of limit/way to figure out what cards have been turned over already vs what still is left to be turned over, so you can strategize about it in different ways, maybe play more risky if you feel you are pretty safe, or play more safe based on what cards could be left as enemy encounters, etc.
Hopefully you can keep working on this, adding more enemies, more shop items, stuff like that (no pressure though, it seems like your time crunch was pretty tough this time around, so you can certainly be proud of what you were able to accomplish here---it's pretty great!)