Yeah, I tested this in a browser way too late into the jam, and was not pleased with how it changed the filter. It looks a lot better when downloaded. I also added a brightness slider, and increasing that slightly seems to improve visibility in the browser version with the crt filter on.
I was considering having some sort of minimap or distance gauge during development, but I felt that having less information would incentivize players to familiarize themselves with the levels (especially in Cul De Sac and Cliffs, since the houses are in distinct clusters, and once you know those clusters you can gauge the distances pretty easily). Of course, since I made the levels I couldn't really anticipate that the initial runs of them might be a bit frustrating, I guess that was a design miscalculation on my part.
Thanks for the feedback, and I'm happy to hear you had an overall good time with the game!