Let me give you a universal design tip:

If time isn't a key factor, the game shouldn't consume the players time idly. For you game this applies to the moving platforms. On some levels you spend most of the time waiting for the platforms to come, even though you would like to proceed.

And some bonus not-so-universal tips:

Do not use a wall with rather noticeable holes in it if you want to put spikes on it. This makes the spikes look like they are floating which is strange.
Also, I don't get why you do not move with the platforms even though you are standing on it. :/

Other than the few problems I mentioned above, the game was pretty fun, with visuals that match together well, and a nice main mechanic. This turned out nice.

P.S. Since itch.io refuses to show our submission under my comments: https://itch.io/jam/brackeys-3/rate/569748

The game is cool, i had fun playing it. I liked the way you used the portals to navigate through the level. Audio and Graphics are pretty nice. The only thing is that the hit box is messed up, what makes very hard to do certain  jumps in some levels, and sometimes the portals teleport you to random places. 

pretty fun game, kind of frustrating when it comes to the moving platforms the hit detection on the spikes, but other than that it was great

not much to say, I just loved it!

Fun platformer, great use of that single mechanic in a really elegant way. 

And graphics are great! Well done :))

Great level design. Simple and fun! I would prefer to player move with platforms. Solid and polished game. Teleporting mechanic was smooth with sound and visual effects you nailed it. Good Job!

That was fun. I liked almost every bit of the game, except the fact that i have to move with the floating platforms. Maybe it was intended this way but it was hart for me. But still one of the best i played so far.

simple and minimalistic, but it's detail level designed, overall its a cool game , and i love how cute the character is lol

Loved it. The graphics are great, the music is awesome and so are the controls. I just had a problem to see the theme in the game. But it's still an amazing game.

Probably the best game to test a speed-runner. Zipping between portals feels very awesome, as does the sound effect which comes when zipping between portals. Graphics are amazing as well. Well done overrall :)

This game is super cute! i LOVE the ability to teleport. nice job!

Really fun mechanics, I had a lot of fun playing this. It would be fun if  player character would following moving platforms.

That was a nice take from all the black holes in this jam, I really enjoyed your game, plus it makes for a great speedrun contender, tho I would not be a contender for this with 20 minutes on the clock lol. Congrats!

Nice design and idea. Loved the gameplay but the enter key is not a good choice for teleport.

Really cool puzzle designs!  It is fun using the teleport pothole. Great ideas here! I like your pixel art style!  If you work on it some more add a parallax background, would look awesome with this game!  Moving platforms are hard to code, i did it once.  It works if you make the character a child of the object when it OnEnterTrigger2d and then leaves the parent OnExit~~ Keep it up~ Great job submitting a game to the jam! Please check out mine when you have time :)

Really clever game. Well put together and fun!

The game looks really good. But there a few bugs and also would be nice that you added a pointer of some sort to show where are you teleporting.

I really like how well this is put together! I did get the error others have on level 4. Also the first time I tried it I couldn't teleport up. Restarting the game fixed that as well. Very nice use of solid platforming and theme!