What's up, OP?
Yep, that was my complaint. The game itself was fine. A little basic, but nothing wrong with it, fun for a few minutes. But like you said - the physics make it unpredictable. That adds frustration, not fun.
Now that you've coded it, though, maybe figure out a better genre of game, one where unpredictability adds to the gameplay. A platformer game just doesn't seem like it, because you want your movement to be predictable when the whole point is to move over obstacles.