This is the most fun I've had playing the jam games so far! Gameplay is the strongest point, and it seems like a lot of work was put into having lots of weapons, a few different enemies, and a great combat/store loop the ensure the player has a lot of fun. Toilet roll being a currency was a funny reminder of the early days of lockdown. Nice touch.
My suggestions for improvements start with the audio. Since you are using asset packs, there isn't really a good reason not to include sounds for every interaction and/or event. The menu and UI felt a bit dead since there were sounds missing there, and exploding barrels were silent. It also took me far too long to realise that some enemies were holding shields. If there were different sound effects for enemies being hit successfully and damaged (a grunt, for example), and an enemy's shield being hit (a smug laugh at your failure to hurt them) then this feedback would clue the player into the mechanics much faster (ie stupid old me, struggling to work out why I killed the first enemy with no problem, but the others seemed invincible).
One improvement you could make to the visuals is to have the little rolling enemies contrast with the colour of the floor for better readability. They were quite difficult to spot quickly, and this game is all about quick reactions!
Overall, a really solid submission! Thanks for sharing.
By the way that you have credited the composer, it looks like you just used someone's existing music? If that's not the case, and the composer made the music for the jam specifically, then let me know and I'll amend my audio rating, because the music was great and really suited the game!