Updated Snake's movement handling

[MarioLiebisch]

Added a short input buffer to make tight turns more flexible, also fixing issue #66.

Related to #66

Type of change

• [x] Bug fix (non breaking change that fixes an issue)

Testing

Please describe the testing you performed on the codebase/project files here and how other users can reproduce your results.

Checklist

• [x] My code follows the general style guidelines of the project
• [x] I have perfomed a self-review of my code
• [x] I have commented my code, particulary where it is unclear
• [x] My changes generate no new warnings or errors
• [x] The project compiles and runs correctly

[Numenter]

Not a fan of the scaling, it's too slow at the start and to fast when the precision matters.

The input changes looking good.

[MarioLiebisch]

Feel free to suggest a different approach/formula, maybe something more towards quadratic?

[Numenter]

Don't like the speed scaling in general, personal preference I guess. I would rather see more apples (like 3 at the same time) and powerups (positive and negative).

[Numenter]

I change my vote, because this an improvement. Don't like the scaling but its better than the current speed.

[MarioLiebisch]

@Joshix-1 Removed the changed difficulty scaling. Does that look better to you?😉