This game is decent. :)
The floor not moving at the same speed as the floor obstacles, or any of the obstacles for that matter, bothers me a lot for some reason. I agree with the checkpoint. As for the General, I think that the sliding should go down more, as well as lowering the slide obstacle, so that it seems more necessary to do so. Also, it would probably be better to make the ground flat, and not sort of parallaxed. Speaking of parallax, the backgrounds are fine, although you might want to make them more pixely, as per GG, and definitely want to change the background color schematics so not to distract from the obstacles and/or make them hard to see. Maybe make the whole game speed faster by a bit, depending on the turnout of the game (if or when changes are made), as the slowness makes the attention toward the game dwindle more as the seconds go by.
Really good for a stencyl game though. All I've made is a crappy snake game with two levels, so yeah...
My favorite level is the second one. ;)