It's a good idea for an old-school style platformer, but the controls are sticky and it ends abruptly.
For the controls, when you jump it just kinda sticks mid-air if you hit a platform before total height is reached. If it was a necessary, you could literally stick & jump from wall to wall to get down into a ditch, so maybe just add levels where that's important?
And when you get to 3700 points, the end of the third stage I believe, music plays and then nothing happens so I'm guessing its the end? It should be lengthened though.
Also, I was trying to listen to music while playing so a mute button would be a nice addition.