Been playing for DAYS now (I just can't get through the Tundra level) and I love it. Literally, accidentally got my roommate addicted too! Excited to see updates!

Damn. What an addictive and fun game! I really like the experience. I gotta say that the Tundra level is pretty brutal and I don't think I can beat it currently. My main feedback would be on the card type. Like mentioned, the water and air type are difficult to spot at glance and the booster vs attack card are too similar, so it would be nice to change the design slightly so that we can easily spot the difference between a boost card and an attack card.

The wind and water symbols are pretty abstract and it can be hard to sort them out accurately

It's pretty good but it seems a bit RNG dependent, plus, I always feel like when I finally get enough resources for something, I have to sell them before I can use them because I don't have any of another resource I need. This might be intentional or maybe more cards are added later on, but on first impression, it comes off as frustrating. On the positive side it's immensely satisfying when I DO actually get all the cards I need quickly enough and can Kill an enemy quickly. You also should consider an HP system because dying from any hit at all seems a bit harsh. But over all, good stuff!