small quality of life changes

A few changes and bug fixes this update.

I decided to put little hint knives on some of the menus so its a little more obvious what to press. 

The information text from running over the little notes in the levels wasnt very responsive, so Ive done them slightly differently

and now they do as they are supposed too.

When changing screen size from 1x 2x or 4x if you are not in full screen, it will automatically move to the centre of the screen if the resize

would have made you go out of the side of the screen, saves you having to move it.

Continue wasnt taking any notice of what level you ahd gotten too, but now it does, and gets saved correctly, so you can start on the last level

you got too.

I altered the maps a little so the ground is solid rather than looking just like a floating platform, looks better

Made the background for level 3 and the nightslasher boss level.

Some more little bug fixes and updates.