Nice game, I especially like how you slowly discover the real use of the rift gun, one of the most organic and best tutorials in this game jam.
The movement is a little wonky, I recommend messing with the Physics2D settings and set the collision detection from "discrete" to "continuous", and also make sure all physics code is in the FixedUpdate() method. Because it seems the player is moving too fast for the platforms to catch properly.
Also, there is great pixel graphics, sfx and music, it was well crafted. Idea is also quite interesting and is somewhat related to the theme.
Good work on the game!