I really like the game. Character and background art is awesome. Card design is very interesting, too. Many cards have unique effects which allows you to think of an interesting strategy.
The only thing that needs improvement, in my opinion, is lack of in-game hints. There are so many mechanics and some rules are not immediately obvious. For example, I died once after reaching size 10 which was unexpected.
Also, it took me a lot of time to realize that the enemies change their intended moves sometimes before their turn. Maybe it happens when their size changes.
Anyway, once you figure out how the game works, it's quite fun.
Maybe it would be cool if some cards had different text depending on your size. For example, 'if you're small, defend 2, otherwise attack 2'
Great job!