This is the best game I've played in this jam, period, the mechanic, the graphics, the cool twist at the third level, everything just worked, I'm really really really impressed by this game, and I'm hoping this will get included in brackeys video
To go into a bit more detail, from the level design, which is fantastic, you've managed to explain how your mechanic is so different from every other game that I've played.
Sure, the fake platforms I've seen in almost every entry, but the way it is used here as the mirror and the fact that you have to consider each side to then complete a section is really well thought out.
And that is not even the impressive part, the enemy, and the way the movement shifts to go the opposite way of your character, this was my favorite bit, together with the fact that you had to keep track of 3 mirrors, I can't even think of how hard it would be to go beyond that.
It really reminds me of 2 games that I really like, Four Sided Fantasy and the mirror levels from The Witness, both are puzzle games that if you haven't played you definitely should.
I do have some tiny nitpicks, one is the player controls, which feels a bit too static, it misses a bit acceleration to smooth out the movement and the jump.
And two is the weird invisible walls of the platforms, for some reason in certain jumps something blocked me (level 5 and 4) and I think its related to hitbox of the player\platforms or the one way collision, we've used a spherical collision for the player and it worked with the platforms in our entry for this jam.
Besides that, really well done, eager to see how you'll take this mechanic from here, because you definitely should continue this game after the jam ends