Hiya mate, I've been in to check the level and its all working fine. You jump on top of the statue to release the key (theres a button on it). I dont see the dissolve you are refering to. There is a lot of green grass there - could it be that you are referring to?

The statue says 'press the button to get a key'. Do you miss that? or have I not made it clear enough? I don't think you are the first person not to realise thats a button.

Adi