Nice game, hooked me up for all day today.
I know it's meant to be indie and roguelike, but starting from scratch becomes annoying at some point. Maybe you could add some roguelite mechanics, e.g. replay current level if you died, not all the game.
I plan on adding different difficulties later on as the game becomes larger. Maybe some sort of "continue credit" like in old arcades could be a nice touch for easy mode. I tried something in my old game Tinyfolks where disabeling some "hard" features that were integral to the designed experience was allowed, it simply disabled getting achievements. We'll see