Not that great... *spoiler*
While the graphics and set up were nice the controls killed this game right out. The jumping was clunky and unresponsive, and the collision detection was equally poor. I like games where I can be sure the character will jump when I hit the jump button... not after 3 or 4 random hits hoping it times right.
In addition, with the poor controls and collision detection I'm pretty sure it makes the puzzles impossible to beat. I'm refering to the goat with the red button puzzle here. I thought It'd be that you'd be smart and outrun it, letting it hit the button... but because the controls are so bad you could never time the jumps correctly and the the goat doesn't press the button anyway. ...And pressing the button yourself is an invariable death.
All and all it had potential, but unbeatable, clunky, slow games are just bad, no matter how good they look.