I think the game is pretty neat, it was for sure chaotic, a lot of the time I felt like I had little understanding of what was going on but I knew I had enemies to defeat and projectiles to dodge. So in that sense of "I have no idea what's going on" there's still a clear objective of "I need to survive". Much like others, I do think the effects are bit overkill at times, though I was big fan of the rain effect, as it set an atmosphere for the room rather than be distracting or impede gameplay.
It took a bit to understand how the weapons worked but I didn't mind the cycling of weapon effects since they all felt useful in someway, there wasn't any particular bad one I noticed so good job on that front.
I think the level design could use a bit more work in my opinion. Most rooms were fine as they had enough open space to dodge, however there was a winding snake like room that made it almost impossible to dodge given that enemies took up almost the width of the entire path way.
I also wish the UI was a bit more responsive, I didn't know whether I was in the right spot to click the map button because it didn't react to me hovering my mouse cursor over it, like the button changing to a darker grey or something as my mouse was over it. Even clicking it sometimes lead to the button not doing anything and it taking multiple clicks to actually open the map. In the end I was able to navigate it but it was a struggle.
Overall though, despite my criticisms, I think this game is pretty fun and fits the theme well in my eyes. Great work!