Second quick feedback update

Thanks for giving feedback to my feedback to your feedback. Now I bring you even more feedback to your feedback.

The things:

• Changed the number visibility so it would be painfully clear which line you should be looking at even when everything is greyed out.

• Added an ability to pause ingame with spacebar.

• Made the text scrolling faster and skippable.

• Updated the "How to play" image to something more understandable.

• Got rid of the score in the top right corner, now it shows up only after the level is finished.

• Fixed bugs with the number that shows lenght when selecting.

• Fixed sound related bugs.

• Changed max level size to 100 so people don't accidentally fry their pcs and removed the "megastructure" achievement.

• Screenshake was deleted (too lazy to make it better)