The game have zero sound effects.
No story. No limits to the field, so you can fall without restarting the game. You need to work on this part. Also add a health bar or life points. Add a little bit of a challenge. No music is bad too, so add a rock song that fit in the game. you can get some in the audio section of newgrounds. Just ask some music composer to give you one song or two.
Over all, the looks of the game is decent. But it lacks something. Keep working pal.