I liked the look and feel and the sound you used plus the voice were great. I played the web version. It seems like if you get it wrong the first time then it drops it in again you just put in the number it told you it was to get it correct. So its a little 'cheat' I suppose. If you maybe gave a score based on how close a person got to the correct number over 5 rounds that might give more variability for a ranking etc. Just a thought. Overall great work!