Hey, cool game, very well done.
My suggestion is to also add an option to play every game mode in shop mode instead of reroll mode where you just can buy all lvl 1 units and all itmes for different prices in a shop and reroll won't be an option. In this mode the game would be more tactical and non dependant on luck with the rerolled set of items and units. Would like to play this :)
Greetings.