Thanks for playing, and glad you enjoyed it. I sort of see what you're saying about the art for the "keys", but their appearance is actually 100% intentional. Along with the rest of the game's colorful aesthetic, they're meant to be a little "wink wink, nudge nudge" reference, which I don't expect everyone (or maybe anyone) to get. Maybe ask yourself what a white square with a smiley face on it reminds you of. :)