I enjoyed this! It's actually pretty challenging. At first I didn't understand which feature I was supposed to select, I started off by selecting the feature that was different, not the feature that most animals shared. Overall, fun game!
Thanks for playing! It will be too easy if the rule is to spot the unique traits of an icon, so I designed the another way around. But I agreed that it is hard to be understood at first, and thus I spent a lot of time making the tutorial. Glad that you like it!