No problem at all!
I do think that if you were to continue working on the game, more enemy and weapon types could indeed benefit it. Something that comes to mind is stuff I've seen in Zelda and similar games: enemies that shoot strictly diagonally, tanky but slow enemies, enemies with almost "hitscan" sniper-like attacks, etc. Regarding weapons, they should interact with those new situations the extre enemies would bring to the table. For example, regarding the hypothetical tanky enemy, there could be a really powerful weapon with a long delay to it that nevertheless kills almost anything in one hit? And for multiple weak enemies, something like an onmyodo spell that functions as an AOE blast? Something along those lines.
Additionally, more styles of traps such as rooms that close in on the player and floor tiles that break when you walk over them.
I feel like it might be good to take inspiration from The Binding of Isaac and Zelda when it comes to your game. Good luck!