Wow... this game is great. Very addictive! The idea is great and the implementation is top notch.
I want to give some constructive criticism/feedback, but these are very nitpicky because the game is really so freakin great already. Trying to make it mostly objective, but some will come down to personal preference.
I feel like the art-style could be more cohesive. The hand drawn cards and the low res pixel numbers don't really fit together that well I think. I personally would prefer if the numbers were more in the style of the cards, but I'm sure the other way around would work well too.
The boss mechanics could be explained a bit better and aren't really that intuitive (at least to me). I also feel like this might be due to the sudden shift/pressure of having stuff depend on a timer while for the rest of the game you are free to take all the time you want.
I would really really encourage you to make it easier to distinguish cards with different operations by color coding them and/or giving them different borders or sth in that direction. As it stands it can be easy to mistake a subtract for a divide card, especially during timed boss events.
Card prices probably could use some adjustments based on their strength. I feel like some cards are just way stronger, but it isn't adequately represented in their price.
Just to say it again: This game absolutely rocks and I only wrote down all these "issues" after playing it a lot because it's genuinely so freaking good already! Great job!!!



















