There is new idea to the idle game in this game what is a good thing. I really hate that it's kill 300 in single game to unlock tier 2 items. The whole point of idle game is that you progress no matter what you do(even if you do nothing at all). So it should be kill 300 enemies in all games not in a single one.
Another dislike is how fights are executed. I see some numbers, I see that something change but I don't see any connection between stats and how fighting goes. Picking new stats in every game is waste of time - only makes me nervous.
Instead of killing hundreds of enemies I would prefer to kill them one by one and see how my stats influence the fight. I would change tier leves to experience gathering level-up with loot system and special awards (for example item for killing certain amount of enemies or getting to certain level).
There was idea to this game but much must be changed to make it fun.