I bought it standalone and it 's one of my favourite games. The whole game is so nicely put out !
But I agree with the people about the price tag for a brower game. Seems really steep.
once your accustomed to them the controls are really ok ! Using only the jump button without the arrows for example or starting from the walls to land precisely on a platform so you don't suffer to much from the slippery feeling.I was surprised as I kept dying and then something clicked. Great game.