Thank you for your feedback.
If you discuss with at least the cow (the first one) and the squirrel, you know the right direction. So it is not about luck ;)
I am pretty sure this slow loading is due to particle effects and shaders. That's sad that when you want to add graphic enhancements to your game it goes wrong.
Indeed, i didn't implement a message to explain the player that he has to press "F" key to get the next message during a talk.
For the tree, i implemented lot of platforms. For sure, not on every branches. But i was really generous on their dimensions and location to ease the climb. It is not my point that this game was a hardcore platformer.
Running is an important feature which ease the run for sure.
The game is designed to be kid friendly. So, the challenge is not high at all. I could have done a harder challenge with ease. However thanks to your comment, i am thinking that it is a good idea to add an option regarding the difficulty (a kid one like a story mode difficulty and a more challenging one).