Like the minimalistic artstyle and the effect. There are a few things I should change if you wanted to change your game a bit after the jam. Doesn't mean you need to do this, just some feedback. 

The control feel a little bit floaty sometimes:     

You can change this for example by adding some more gravity and also enlarge your jump force so you keep the same jump height.

The jump feels not that powerfull sometimes:            

When you dubble jump but already have a downwards velocity your resulting jump velocity will be low or 0. You can change this easily by first setting the downwards velocity to zero. Also I should add a bit more in air movement

Sometimes the camera clips or moves back to the player:             

When you are moving and stop moving the camera will go back a bit to the player, this is probably intentional. But sometimes it feels that you are going slow and takes away your ritme.

Audio:         

The sound effect sound a little shrill but it's okay if you lower your volume. I don't know if you wanted some music in your game but it's very easy to just generate a song. I did the same for my game on "Strofe". 

Further more I really liked the idea of repeating the level and always making it harder.                          

That I gave you a lot of feedback is certainly not because you made a bad game, you should be proud of what you made and this on 7 days. Good job! 

Very cool game! Just reached the double jump cancel, couldn't do it with the double platforms damn "Im BAD at 2D platformers btw xD" but it was a nice experience!  Only things i would do is to bring checkpoints and making the double jump more precise, when you double jump it does it respecting your fall speed, so if we fall and press double jump we don't double jump as we keep falling, i think this can be fix making the Rigidbody to reset the Y velocity!   Overall, great game!! Hardcore af lul

I had a lot of fun playing this. Some of the "debuffs" were soooo hard. I like the blurry edges of the screen a lot. And the camera damping. It miiiiight snap back a bit too quickly. It was disorienting sometimes. But with just  a little tweak there, I think the game is excellent! Good job :)

Nice game! I thought the ui was a bit too small and the camera shake was a bit too much. Otherwise it was a nice platformer! 

Great work of using what you already did as an advantage to expand gameplay! It's interesting how one level can be played in so many ways with just flipping of one single game mechanic.
This game needs some serious bgm tho. Would be a lot better if there's like an intense music and a bit of post-processing.

Pretty cool game! Just a couple things that I thought could be improved: 

the music doesn't really exist, the death sounds could be slightly "clearer", the UI text and stuff seems a bit small (at least for my resolution 1920x1080) and i couldn't really make out what some text in the corner said, the camera is a bit too "floaty" for my liking, and finally pressing "continue" in the menu just loads up the level (but makes double jump not work or something i have no idea). Also because of some of those problems, I didn't know how to get past level 3.

Still, the player movement is really nice to control, the film grain effect thingy is really nice, the visuals and stuff are simplistic but aren't bad. The different level difficulties like swapping A and D are pretty cool also, just that (mentioned above), I kept dying in level 3. Or most likely i just suck ._.

Again, nice game!