Really love what you did with the concept! Switching the level layout and gravity mechanics is super cool and it feels pretty good to play! My only criticisms would be maybe add some way to know when you have the ability to switch between black and white. Maybe I'm just misunderstanding, but I found myself constantly clicking and not knowing when or if it would switch which really stopped the momentum and constantly had me dying. It seems like you cant be moving with WSAD and click at the same time? Also you cant switch mid air? Being able to combine moving, jumping, and switching a little more seamlessly would make the game-feel perfect. Let me know if I'm just not understanding the mechanics!
EDIT: okay using enter is WAY more consistent than mouse click, also setting my refresh rate to 60hz helped - @ 165hz polling was inconsistent I guess, maybe just having browser issues