Really fun, this was pretty good, with solid controls, the art is awesome :D feels really polished !
And you have some interesting mechanics with the "powering up" of elements to use them, blocks to get cover from shots the light area and so on. I also really like the game's theme with the bit guy being the only 1 in a world of 0 :p
To be fair, a few small issues though, the light area mechanics are good but the levels you used them in felt like the area was a bit small, the platforming one since the screen can scroll makes it hard to remember exactly where to land, not a huge issue but a bit of tweaking could improve that.
I encountered a bug, in the level with the "1" block moving left and right in the dark room, if you jump on the side of the block you stick to it, and if it pushes you into the wall you're stuck there and have to quit the game.
Otherwise it's really well made and i had fun :) Congrats !!