Thank you! Glad you liked it.
I enjoy using the pixel shader (though it's not a shader but a simple solution to hard-cap the game resolution) as I like how it looks and it allows me to make simple sprites without much details (and I'm not much of an artist). I know some people don't like it and I thought of giving an option to disable it but I was concerned there would be too much of a difficulty difference when playing with and without it.