Well, I love Portal, so immediately you get points there. I like how the character is very definitely inspired by Binding of Isaac, it's cute! I think this was an interesting take on the puzzle structure of the Portal games, so points there too!
Couple things. I know it's been mentioned before, but the move speed is just way too high - There were a number of times throughout playing the game that I would unintentionally go through a portal and fall into the hole enough times to end the game immediately. There was also not enough feedback when I would take damage - a lot of the time, I didn't' even realize I'd gotten hurt or fallen into a hole because of how fast I would move and respawn. It also felt like it would register me falling into a hole even though I didn't THINK I touched it sometimes. This could be related to the speed, I'm not sure. To be honest, the speed is my primary gripe about the game - most of the time I died and had to restart, it wasn't because I messed up the puzzle, it was because I didn't feel like I was in control of the character's movement.
Overall, I think this is an interesting game that has a good connection (heh) to the theme! A bit more tweaking of some of the hitboxes, speed, and things of that nature, on top of more levels, and this could be a really fun, fleshed out game! Nice work!