I liked it! It is a very original concept, and I found it challenging but fun. Getting blindness on 80% of the timer was sometimes a bit heartbreaking 🥀.
I wish there was a way to deselect the selected number, because I found myself wanting to undo it at some point. I ended up clicking the trash button, which turned out to delete the entire card 🥲.
All in all, great concept and art, well done!