Yup, not hiding that! ^_^
The different characters have slightly different gameplay (their speed or the way ground and power ups spawn varies a bit), and it has a hidden Game Boy mode... but it is indeed a veeery short game! We are ok with that, it was a project to learn and have some fun (that's why it's free), and we definitely reached that goal.
If it kept you entertained just for a couple minutes, we are glad. We will try to make it better next time. Thanks for playing, thanks for the feedback, and have a Merry Christmas! :)