Nice, short game. A couple of suggestions:
- Randomize the effects for each level. Would spice up replayability
- Add a height level tree. It would be great if for each height level, the weapon size and the player size increases with the camera zooming out.
- Add a timer. Like every Vampire Surivor game has.
- Add hyper content. I play growth games for things to get comically large and overpowered and it would be great to see things get BIG ass there is no such thing as "too big".