Sure it is a great way to do the thing! Competitive Arena Shooter is a Gem of fangames, no one else does this as a fangame for jams, especially with such a good quality - effects with materials, post process effects, global time dilation...
However, let's call it a next task to implement: every game should have a Title Screen, Main Menu, maybe Game Mode (Meaning not a [GameMode] asset but terms of gameplay: Story Mode, PvP arena, Survival Mode, etc.), Character Select (if many characters available), Arena Select, all this stuff.
If you play my game, you can pay attention to how the menu flow is made there, as a great example, and surely you are able to implement something like this in your game too. We live - we learn!
Thank you!