To start developing games is the hardest step, keep practicing and don't mind about others. If you create something it is your's and only your's, other people are just jelous :) :) Qwandri is right, buti wuldsay that it isn't better, it is unique becouse it is your's :) Even game : to jump over box is cool as the first game :) Feeling after creating it, playing, and watching as other people play's it is best reward :) (sorry for chaotic comment, but it is my style of talking in language which isn't my main lang :) ) Keep going and don't stop man :)
Add something like personal highscore, or something to see how close are you to achieve expert posibility and maybe some more levels ? Too short...but i like it, stick man again in action :)
Cool, more levels, 1 level 500 red K's until green, 2 level 1000 red K's until g.... etc.... would be cool, for long winter evenings..... 3/5 cos dragging them aut is complicated and they sometimes glue to a cursor... Oh... after completing whole game, auto mode, like autodraging feature :)