Things I, and many others, have issues with:
1. The skill lottery: 80% of the skills are useless (ex.: lifesteal is incredibly unbalanced) due to the loss they bring which makes the loterry incredibly frustrating. I'd rather pick my useable skills completely. The Archero inspiration is pretty obvious, not necessarily bad, but still.
2. The paywall and ad tsunami. Advertising the game as A a game and B as free only for the player to hit a paywall after the first Boss is incredibly disingenuous, not to mention that to get the deck "freely" you have to watch at least 20 ads which is at least 10min of waiting time. That's for every New Island too. That's not all though. Not just every time one starts a run you will get hit with an ad ontop of all of that, but every floor? That's too much dude and frankly quote ridiculous. This is a Demo desperate for money, not a game. What's funny though is that the players literally feel like Cheese.
You might reach 500k downloads, but not many will keep the game.
Check out the way "My little universe" handle this. They listen to their fanbase and managed to find a solution for the ad stuff while keeping the game super attractive.
The game is great, well designed, good dialogue, only a few grammar mistakes and nice variety, but those two issues up there are big and can land you a bad image. I understand that this is work and you need to be payed, but there's a way to get that. Deceit ain't it.