Thank you! The only real way to lose is if you don't kill the boss in time, I treated enemies reaching the portal as the failure point but it instead affects the bosses overall health. I definitely could see locking the upgrades between either clearing a round without any misses or having to fight a mini boss when the rounds over to redeem yourself and still get your upgrades. As it stands it's just a bit of fun mostly brain off kind of a game which I don't mind being my first submission :)