For a broken game, this is pretty fun! It needs a little polish and adjustment to a couple of places (Those elevator platforms could go up and down a hair slower, those things make me slightly dizzy forcing the screen to scroll up and down quickly), but otherwise this isn't too bad. I can see it doing well with some continued work to round things out and fill out the missing content.
The chicken mid-boss could use some adjustment so the mini-chickens won't spawn with any speedsters in their ranks.
Good entry!