An untidy and confused mixture of things, feelings, or ideas. (Cambridge Dictionary)
A jumble of things is a lot of different things that are all mixed together in a disorganised or confused way. (Collins Dictionary)
To move in a confused or disordered manner. (Merriam – Webster)
An untidy collection or pile of things. (Oxford Dictionaries)
Example
Jumble of wooden Scrabble letter tiles.

https://www.alamy.com/stock-photo-jumble-of-wooden-scrabble-letter-tiles-74073537.html