Hey, I'm really thankful for your keen observation throughout the game, and I'm happy to hear that you liked the game.
I'll be fixing the darkness as I also felt it a bit more darker than normal.
And for the jumps when the time slows down... It's intentional... It was done to make it affect the player speed and jumps according to the time as it is out of control, as per the theme of GMTK , but got less time to do then, so... I added it later.
And the level where you got stuck where the mouse goes down, might be because you are supposed to catch the mouse and then use the "s" key to spawn your mouse and not let it go on it's own. Well my bad at the level design though, my apologies. I'm currently doing the basic mechanisms and adding more stuffs to the game so didn't focus on the level design and game story. ( recently added superhero landing and wall jumps )
And thankyou again that you dig so deep for this game even when it's not that polished. Ummm maybe the reason for my game to not get enough ratings... might be because it wasn't polished and finished. As GMTK being my first game jam, i was worried to make my game even playable at the very end of submission that led to many dropped ideas and led to a raw submission. ( I generally take a week or two to make a game )
And please feel free to put your reviews, I feel thankful reading them wether it's negative or positive I love both.
I love GMS too, and sure I'll be troubling you with lots of questions. ;p