Nice idea and execution Hoodie! I just finished my first attempt. Here is my feedback - won't be the last one - really like what you are doing here.
- The fight animation - as simple as it is - is just awesome
- The drag&drop mechanic is intuitive and easy to learn (I played a lot of Card Survival Tropical Island, so this might play a role here)
- "Everything is a card" is a powerful goal and limitation, there is so much creative potential to this
Bugs (maybe?)
- After the effect of a +X inventory slots item was wearing off, my player dropped all the gear (which was expected), but after that I couldn't attach my spear and scale shield any more (there was no hover action coming up), they also weren't usable in recipes from that point on (maybe no more slots left? if so, can you show a hover info like "no free slots"?)
- Timing for this was really bad, I lost my 2nd boss fight without weapon and armor :-(
Some ideas
- Hovering a recipe card could subtle highlight all potential cards serving as needed items, makes it a little easier to find&pick the right candidates (and helps learning how to craft in the beginning)
- Splitting items into two (like bark into some kind of wood and fiber) and combing items (two fiber into rope) might add variety, if this is needed
Looking forward to round 2 :-D