Nice idea! Though I suppose this is technically "count up"... I understand you made this in one day, I think with a larger variety of enemies and levels, this could make for a very engaging game! As it is right now, it's a little too easy to just walk around and pick up the gems one by one. You don't really have to engage with any of the enemies most of the time. Anyway, promising concept, I enjoyed playing it. Nice entry :)