A really cool game!! The visuals are incredible and the soundtrack makes it fun and relaxing to keep playing! I really like the countdown timer rather than an instant loss - it makes it feel a bit more forgiving, but also increases the stress when it starts ticking down, making it almost addictive!!
My main issue was the text - I personally found it quite hard to read. I agree with what others said, about maybe including more of an explanation of how you had to match the rarity levels of slices, although I worked that out fairly quickly, so for me it was a minor issue. The other minor feedback I have is that it would be nice if there were more upgrades early on - I had to play for a while before it felt like I was actually starting to get lots of upgrades and level up. Given this is a game jam, its often good to have a quick start to the game.
But genuinely, all of those are very minor things. This game is incredibly polished and super fun!