I loved the concept and the graphics are super charming! I really liked the presentation, and the idea that your person for this battle royale is using randomly generated weapons/effects is quite entertaining and can lead to lots of playability in the future!
The game itself... was very hard for me... Maybe I was doing something wrong but i'd say ~12/15 times I tried I died within 3 seconds of starting. Luckily restarting and rerolling was pretty quick! But I had no time to get my bearings. I think the longest I survived was like 20 seconds while dodging a million enemy bullets and surviving to the top 290? I don't know if maybe it would help if the game was slowed down, or at least have a little area that's a bit safer in the beginning so the player can understand what their attack does for a few seconds before getting ambushed.
I could just be bad though, and I really did like the concept and the look of the game! I definitely think this idea could be expanded upon into a greater game! Good work!!