Lots of potential on this (as someone who loves incrementals).
Feel like the one thing that isn't working so well is that it takes a while to figure out what is doing what (what isHP ? when do we lose it?)
HP is the health you have (obviously). At the beginning, you have 10, and lose 0.1 every second. Every time you hit a word, you lose health (I haven't figured out how much per word yet). Once it hits 0, the session is done, as I assume you have already figured out. You can see the health in the upper left corner