Neat action game. There's a lot you can do with that light mechanic if you wanted to expand the game! I really liked how taking damage was conveyed! It was also interesting that it made each level a bit harder too.
Something that could be improved is the disappearing blocks. I think something like a dotted line could help show the player where they are while intangible, since sometimes I would switch the lights and end up inside a block.
Great job!