I reached the 13th wave during my last run.
You always make original games with a strong implementation of the theme, that's super cool. The upgrades based on the houses of cards fit the theme so well , obviously they're the ones you're always going to get to take because they're so cool, both the strongest and most fun ones, totally aware that they're also going to be completely unreliable when you're going to need them the most, that's brilliant.
The game looks good because the artstyle is very consistent, it controls perfectly and the enemies propose the right threat, I love the tension as you realise a machine-gun one just popped.
Awesome game!