You actually have a great idea in your hands! That was fun! Might I suggest a few things?

First, that artstyle I think it's better for vector art than for pixel art, it will make the game look a lot more smooth.

About the gameplay, the steps to store the box are a bit complicated, like I have to remember the key combinations to open, put the box and close, and by the time I do that, like 4 cubes go by. Maybe Up, Down and P are enough, I think shift complicates things and it also makes me lift my hands off the keyboard to switch from combination to combination since one should be on W and shift, another on P and another on the Up and Down arrow, so I have 3 hands positions and... just 2 hands unfortunately :-( Unless I stretch them in an uncomfortable way I'll be moving hands around and looking at the keyboard a lot. Also, maybe switch P for Enter or right Ctrl? so with one hand I can cover UP, DOWN and ENTER/INTRO/CTRL to store a box. No SHIFT key.

If you read the rest of the comments they're telling you roughly the same, the key combinations make it confusing and/or too hard.

Also, the list.. it's hard to read while you're frantically trying to hit and store boxes. Maybe a pause when adding a new item to the list will help. I mean, it's fair if I lose because I didn't memorize the items, but not because I didn't notice a new item just popped into the list while I was storing a box. Also visual queues on the list might help, like a little green box and a hammer, or a black box and an UP arrow... Not all of us have lightning fast reaction time, some players are faster, others are slower so you need to find a balance between both, otherwise it will get overwhelming at first for a lot of people.

The core mechanic is very fun and the animations are cool, I think you just have to tweak the gameplay to make it more fair, comfortable and fun  for everyone. But definitely (despite my observations) a great entry for the jam, good job!

Fun and funny art style.  Game is too hard from the get go, though I like the idea.  :D

Nice animation but it's quite hard. Good job!

The animation and art was so good!! I just found the button configuration a bit confusing. But maybe that was just me. That being said it was a very good concept, and I just have to say it again, THE ANIMATION WAS SO FUNNY AND PRETTY! Good job!

very funny.  i like the animation. great concept! :D

Made it to 24 seconds, but I couldn't keep it up for longer, it was simply too difficult! At some point after a while of trying to tie up my fingers like a bow tie to make it work, I set up a macro to move them closer together, and it was still too difficult. The animations and music and sound effects however were masterfully done, especially for such a short amount of time, its polish was far beyond what the time limit would suggest. Even if the difficulty curve needs a bit of an adjustment, at least for me, it was an enjoyable game! well done!

Very funny animations and a wild control scheme my fingers definitely turned into pretzels lol 

Great animations, really good. The game concept is fun and engaging, in need of balancing, but I would definitely  love to see a future version. Amazing work.

I love the goofy artstyle, the character looks awesome !

Also, props to you for making a proper in-game tutorial, I always slap a rushed 2 lines description after uploading my game because of bad time management, so I really respect you for this.

My problem with the game has already been mentionned in multiple comments, it is the akwardness of the controls.

But you seemed to have a concept in mind for this, so maybe its more of a difficulty balance issue, rather than a game design issue, because I can definitely see the "Twister with a keyboard" being a really fun experience.