Nice game for a 2 player experience, although very difficult to play while easy to master, this is usually a turn off to new players, so try to play with that.
Visuals can be improved, and this game is a good candidate for mobile (on device multiplayer and online multiplayer as well).
Find ways to add 'rewards' for example: a certain part on the bar, although a wrong place that makes you lose the round, gains you a boost in 'something' for the next round(s). Doing this will add tactics to the game and make it more fun.
Good job :)