A very nice game! It feels like a unique and fun mix between an inventory system and a match-3 game.
I had fun hacking the score by sorting items before removing the out-of-place ones! XD
I think you should turn off focus mode on your UI control nodes when it's not needed. Right now, it causes the focused button to be activated whenever you press enter or space, also the game can use some more polish tricks ( like : making the buttons more juicy by making them squach and stretch when pressed )
Overall, a great submission !