Updated graphics and added mobile support

Had a fairly productive evening working on my game, I have added some background graphics and a start sequence where you launch the Yeti at an angle determined by a snowman's stick arms waving about.

I have also added mobile support (Shout-out to Sean for the Better Minimal WebGL Template for unity), the game seems to work fairly well on mobile devices, do appear to be some issues with full-screen and aspect ratio etc. at this stage I am not sure if it is possible to improve this, or if the site just works that way for mobile, I will continue to investigate this.

I am fairly happy with the progress on the start sequence but I think the snowman arms are not visible enough on mobile devices, I may add a larger arrow or something similar, I would also like to have an animation for when the Yeti is waiting to launch, the tile set I am using has a sequence where he is banging his chest which would probably work, I haven't been able to find a suitable sound effect for this as yet.

I should also possibly think about adding some graphics options, I could remove some layers of the parallax background and spawn fewer background objects to increase performance.