It gets this score because while it's an easy game, this game can be sometimes punishing to the player out of nowhere and forces you to restart the WHOLE game because in some stages, if you pick the wrong path, there's NO way to go back to a previous level to go to the correct path, meaning that either you die on purpose OR have to click on Menu and then click Play to realize that this game has no "save" nor checkpoint system to send you back to where the game allows you to go back.
One problem is controls, while it's not so bad itself, they're good as is, the problem starts where a level requires you to jump over a spike but not too high to hit a spike above you. In any other game, pressing the jump button lightly gives you a shorter jump, but holding it longer gives you longer, full jump. In this game, every press on Jump is always a full jump, so you have to awkwardly jump then move instead of using short jumps in a good pace. What doesn't work is any platforming with slopes, because it gives you inconsistent jumps, so you might either jump backwards or jump in a straight line, which you'll have to correct yourself whilst airborne. In some stages, this is annoying because it's the game fucking you over rather than your bad skills be the cause of it.