Screen colors changing, colors going darker and more intense

I've had my MacBook for 5 years, I bought it when it came out. It's a 2015 12" retina. I use it quite a lot, for gaming, music making, video watching, video taking/editing, etc. It's portable, too. I have had keyboard trouble for the past few months, a lot of keys have stopped their functioning. I noticed last night that my screen was changing colors amidst the smallest shake. I then noticed it would also do so when walking with it. Then, I saw it does so when you change the display position. It was good for a long time, but I think it's time for an iPad. :/

The video [MUST WATCH]: https://youtu.be/P8EmnGEfozc