This game's artwork and sound design is absolutely incredible. Looks like you're going for true pixel art look, and I know that's challenging with the font sizing, but it really look gorgeous in this game. Everything from the cards to the menu elements look sleek, but the tooltip design and and the legendary text are my favorite visuals.
I think the tutorial works pretty great, it would be even better if it let you transition to a full game instead of having you start over. The boss levels could stand out a bit more I think. Maybe a little intro before you start the round or something.
The gameplay is fun, but can feel repetitive after you get the hang of it. I think more gameplay choices would help. You can always add more upgrade options, but I think you need a different "dimension" of depth like ways to modify your deck, or some interesting options in the queue . The card design reminds me a lot of Uno, maybe you could consider adding the reverse card to let you count back upwards (don't sue me M*ttel).
p.s. I saw you mention shorting Common to Comm, to get that looking right, could you go for "Basic" instead? It might look more readable.
Viewing post in AEZIO jam comments
The main reason I wanted the tutorial to be self-contained was that it’s based on the same random seed each time, so that could be exploited in gameplay. I’ll look into ways of making the boss levels stand out more.
Upgrades that modify the hand/deck have been thought about and were intended to be implemented in the jam version but never made it in due to time constraints. They are planned to be added to a future update, along with other card types I have thought about, and extra gameplay features like rerolling and maybe a hold system (like Tetris). UNO was the main inspiration for the card designs, but allowing counting up would make it not fit the original game jam theme anymore (Count Down), although I do know that the game’s design isn’t directly tied to counting down specifically.
Basic wouldn’t be a rarity anymore would it? “Normal” could be an option maybe.