At first I simply found this game cute and fun, but it had great surprises just around the corners!
The art works really well, especially when in a card game we expect seeing familiar cards, and I that that's what shapes the environment is built. The colors also create a sense of priority of what to look for or interact with, which is cool and fits really well.
The mechanics are really simple but well executed (I love that the little jiggle when walking affects the collision of the player!), although sometimes I felt like I couldn't flip a card I thought I should be able to. If there is a range mechanic, I feel like it's not explicit enough - or maybe I was just missing the cards with my click and didn't notice, lol
As for the main quest, it felt a little all over the place. The game makes a great job at explaining what you need to do at the start - from the beginning I knew it was about looking for a dog or something related -, but I don't feel like it really follows it throughout the gameplay. Having a lot of the interactions to be, even if fun and unexpected, just silly in nature, mislead me to think that all interactions would be just that, which made me stop playing the first time. I even mist a key item while running around just clicking to see what would happen, as I thought that's all the game had to offer. Don't get me wrong, all the silly interactions are great and made me happily chuckle.
Another thing is that, in my first playthrough I thought the black ground was a wall and never really got close to it, and just in my second I realized it could be some kind of guiding line. The scene (the background, the walls) doesn't seem to fit that well with the aesthetic the cards are going for. Maybe a result of the time available, but that may be something to look for in the future, as the art is already good as is.
Finally, after all, it is a great and appealing game worth playing :D