Sorry, I forgot to clarify that you need to press "Enter" for that. My bad :(
That's fine. In a jam we don't have that much time to think about every detail to explain to the player. An future update (if you might) you could make an box popping in the screen telling that you conquer an achievement (like in steam games)
Haha, I wanted to do that, but in the end... well, there is none. :(
