it would be cool if there was an elevator level, where enemies endlessly keep coming and you need to survive as long as you can and there will be like a timer on the top, it will also be cool if there was a vampire boss that attacks you and its own allies to gain health and maybe a new ability called twilight bite where you grab an enemy bite them and gain health, I also have an idea for a new classes , maybe you could add a slasher class this class has a knife throw and a low kick and a new weapon called combat knife it hits 2 times and applies bleed upgrades to machete hits 4 times also applying bleed then upgrades to katana this attack hits once but you slash through a row of enemies and apply bleed, with this new ablitity maybe you could a new mini boss like a samurai boss or something like that, you can also deflect bullets with this attack, another idea i thought would be fun to have a mode where you don't get to pick your upgrades, just for fun