It's only for card (atleast on android) you can skip by just closing the selections which can be a bit annoying on endless playing around trying to collect the perfect deck for the different monster types and such (goblin is impossible of your forces to pick the no hold after all)
Well don't need a retry button but could be nice if at the very least it just scrub your save or something so you don't have to make a new one hehe I ended up just having them all named "a"
And for health well tier 3 you can still get one shot at some point if you have a bad hand and if you add more tiers (or endless mode) then you will need it in some form even minor
Look forward to the polish on the endless mode
Also have you considered adding some sort of temporary effects based on what you transform into? Like improve slime card for slime or just +1 toxicity? Maybe 1 life steal for demon or something to make them special to turn into?