Request to add a few features

[shivammishra2004]

I know i am asking to much even though i am using this for free. But i think these feature will definitely help the user experience
The features are as follows:

1. Adding a dark mode
2. Also a key to access next will decreases the reliance of mouse and hence user can do it faster.
   Thanks for making this wonderful website, I hope you will find the time implement these changes.

[oskarissimus]

+1 for dark mode :)