Please help us improve this game

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http://androidforums.com – My friend and I created an android game with our spare time. this is our first game, lots of time spent on it. we are using the cocos2d-x framework to build this game to acheive best quality. but we don't feel good about it, it's one of those classical jump games. we need advices from users to improve this game. below it's a link to our game: https://play.google.com/store/apps/details?id=com.waka.wakajump&feature=... if link is not allowed, i will delete it. The prototype comes from the famous Doodle Jump. we made some changes: 1. we adjust the jump speed as user gets to hi (General)