Not very good
There's no music, no timer displayed, no lives, and nothing which can cause the reduction of points or time. This concept has been covered before but you are missing lots of things which make it a good concept. You could add lives, sounds, goals which lead to different levels (point based goals etc) items which take away
time and lives and their counterparts items which reward extra time and lives.
You should make a move advanced stat bar, the one used in this game is practically non-existant and the score is also cut off. Maybe you could add one and then add things to it.