Looks like a very promising idea. I see where people would struggle with the combat system but I think that could be solved by having quick access to the list of rules in the pause menu. Love that you were able to make a game talking about real-world issues such as climate change and putting down Starbucks.

The docs are great, it's good you got feedback so soon, will help in the following phase. Looking forward to see more!

I think your game sounds fun! In particular I think the idea of being able to play each card either as defense or offense sounds really unique, and strategically interesting (if I have a +3, do I want to use it to make sure I don't get killed by that enemy, or use it to take out this other enemy?). I think your theming is really cute, especially having the enemies be different forms of litter. I would say, though, that your scope seems a little wide, at least to my ears. Having 4 types of enemies, other types of hazard, and treasure chests sounds like a lot, not to mention that you also want to have 5 full levels and a boss fight at the end. Maybe you'll be able to get it done in the time, but it never hurts to have a plan for what to cut.