Supergiant Slider

Watched @Nelson Abalos Jr video on creating this slider in webflow, decided to take it for a spin and create one for one of my favorite game developers website: http://www.supergiantgames.com/

you can see the demo at: http://cloudbank.webflow.io/

Anyone got any tips on how to make my gifs look better? There's a lot of grain and dithering going on in this one :(