Congrats on finishing your game!
There is a lot going on here. It looks like you may have had a pretty ambitious idea, but perhaps just ran out of time. Such is a jam!
I think this is just missing a lot of small quality of life and ease of use components. Volume controls and a fresh level reset when you die would go a long ways towards making this just feel better. That, and using a bit more standard control layout. The mouse is usually reserved for actions that the player is expected to use repeatedly in succession or that requires pointing precision, such as attacking or interacting respectively. The jump just feels a bit off. But I can see it being justified if the game were an auto-runner or something so you could play with one hand.
The important part is that you made a game in one week. You probably learned a ton. Keep making games and keep learning!