I hope you got passed the 2nd level. xD It was hard for my other friends.
Yep for some reason after exporting the textures starts to glitch out sometimes when changing scene. I have already added to my list of bugs to fix.
Yep, it is suppose to be pixelated.
I have to test on my hardwares tho about the fps drop. I do experience fps drop one time during the beginning. A few secs after loading a scene. But I am not sure why. Will update soon.