Gonna check this game from time to time. Captivity was quite nice game and this one is definetly inspired by it. It's gonna be interesting what this game will be.
Few things: Coins shouldn't disappear (or at lest be toggle function for it if there's any perfomance concerns). It's really annoying since it's really impossible to pick up coins during some waves due amount of enemies.
Post this game on F95zone, you will get some feedback from this site as well.
A bit more time between waves (make it 10 second but allow to start it immediatly by pressing a button). Currently it's quite hard to run from one item to other item if needed.
Only thing would be interesting to see if enemies would be able to apply some status effects that can stack up making gameplay a bit harder. (Maybe some enemies will hypnotize during h-scenes \ have special attack that trying to hypnotize and later it can lead to character sometimes unable to act like he was knocked out or taking additional normal and h-damage. Obviously ,there should be way to cleanse it as well)