My feedback for Mind Over Matter:
What your game does well:
Great mechanic that incorporates the theme 'inside out'. Both character roles must be used for the player to beat each level.
Your setting is original. Not many games where you pop your brain out to complete objectives and then put your brain back like it never happened.
The character assets are well drawn and easily-readable. The player knows exactly who/what they're controlling.
What your game doesn't do well:
The sound effects are really loud in comparison to the soundtrack.
On the first level where the player is supposed to eject their brain, it isn't made clear in the game how to do this at all. I wasn't able to get past the level until I read the description.
While the leaderboard is good for creating community and competition around your game, it encourages the opposite of what each level is encouraging from the player. That is, some levels in the game feel like puzzles to solve but the player has to rush to figure them out because, although it's not required, they are aware that they are being timed. So naturally they will try to be quick.
Areas of Opportunity:
You can take your game in one or both directions, but separately: speed-running and puzzle-solving. You have the levels, and the code to continue to build on this. I recommend making two separate game modes for this.
I'd also find a way to teach the player the controls directly within the game. I can't be the only person who tried to jump through the small hole as a human.
I hope this feedback helps!