Very nice visuals. The crt effect is very good.
I did manage to finish the game, but I did find the beginning to be a little too hard on the player.
I think it's very important to let the player get used to your game's physics and collision boxes before putting too many obstacles in front of them. Specially for the kind of platformer that you are going for. The first couple levels felt a little too hard in my opinion. Maybe, instead of having double saw blades first thing of the first level, you could, for example, start with single blades on the floor, so that the player can get used to the movement of the game.
The physics are not bad in my opinion. Maybe the player character could be a little less slippery on the ground, but I think it's fine as it is. I really think my only complaint would be the initial difficulty. Oh, and someone mentioned resetting level elements on player restart and I agree on that. I think resetting elements would let the player develop a muscle memory for the level.
Other than that, I actually enjoyed the game once I got the hang of it!