I was just trying something out today and noticed when I start the game, the entire object drops slightly down before rotating Quick video of issue https://www.dropbox.com/s/f5bibsvmer1phsr/ice_video_20160117-181523.webm?dl=0
Is your Game Frame covering the whole screen? This usually happens to me when the Game Frame isn't set up correctly for your specific game. My guess is your character is moving past the upper limit of the Game Frame which is moving the whole screen upwards to start. Try hitting "Show Game Frame" button in the top right and then reconfigure it to whatever works best for how you want the movement to look.
Didn't get it as I do not have any character yet in the game. Besides, this frame thing is confusing me I want game height to go higher but no way to increase the frame
Ah, I'm not sure then. I thought the circle moving around was the character, so if the character goes out of frame the screen would adjust. I tried making something similar to you, but I couldn't get it to make the screen move. I'll keep playing around with it though.