First of all, good job: you made a game in 72 hours and that's no easy feat. I'm not sure if it was only me, but I had no sound, but I assume it was a glitch on my end as there is credited music and also a music switch. Unfortunately, the lack of sound made it a lot more difficult to understand what I was doing right/wrong. 

I do think the game was a bit on the buggy side (the player wasn't orienting correctly depending on the direction of gravity, so I ended up walking on my head most of the time), and overall there were just a lot of small things that could be improved for next time. Mostly I'd also recommend adding visual feedback for when you get hit, (that's something I myself failed to add in my game). In addition, some of the challenges (again, I don't know how much audio would have helped) seemed more cryptic rather than puzzles. 

Overall, I think this game has a lot of potential but unfortunately is hindered by the short development time. Although the circumstances of my playthrough were a bit unfortunate, I do believe that game was at the very least somewhat enjoyable. Anyways, even if this game has fallen a bit short on some ends, there will always be a next time, and I hope you keep on improving!

I like the mechanics of concept of the game, they're awesome. Amazing work!

A Gravity Changing platformer where you have to die to progress!

The Game has a cool mechanic (the gravity switching) and you can use it to get to the ceiling/floor. It got used with the level design(e.g.: the level where you have to find coins to proceed forward).

Sadly you can see there wasnt alot of Playtesting involved(atleast it seems like it). With Playtesting you could have better player feedback and boundaries(In the last level, you can fly endlessly away).

But these Mistakes are ok and next time(I sometimes forget it/ dont have time to do it too). But next time, if you have time, use it to playtest the game. Its not really a gamebreaking mistake, but it can make your game more enjoyable.

You still did a good Job with the Game :)

I like the  VVVVVV  concept of this game and the idea of tricking players. I found a few bugs, for example, for some reason, the character's sprite didn't flip, and the animations sometimes stopped, but you're still cool!

I have no idea how to pass the first level, please help

Simple yet interesting  :D I suggest you that when changing gravity midair players sprite should flip instantly not when he touches to walls that way it will be more responsive :d Other than that you did a  nice job well done :)

Nice and simple! Changing the gravity was a bit buggy tough - character didn't always flip. Also, did you add any music or sounds? I didn't hear anything 

pretty good  but the downloading is kinda pain

Let me guess. you rename the project and delete the wrong data folder lol?

For the game. The idea is interesting but the rule is not very clear, I just randomly try hitting the spikes and I don't quite understand how did I pass the levels, even after I finish the game..

maybe give players some hints and feedback to explain what they did well to pass the level would be helpful.

Fun mechanic! It was pretty easy to beat but you did a good job! Also had to rename the Data folder.

Interesting project.

Definitely needs a bit more polishing. Graphics are ok. You could also add more sounds.
Oh, and in order to play, you have to rename one folder 
from "Gravity Puzzle_Data" to "Gravity Rules_Data"

You need to rename the "Gravity Puzzle_Data" to "Gravity Rules_Data" :)