Getting surrounded is a quick reminder that button mashing only goes so far. You need to watch your spacing, save a counter for the right moment, and sometimes admit that your chosen upgrades aren't doing you any favors. Switching heroes changes the rhythm enough to keep things interesting. The full version is unlocked here, leaving the complete adventure open to play through. Losing a run can sting, especially when a boss was nearly finished, but figuring out what went wrong gives you a good reason to head straight back in.