I agree, that's why I added "Hardcore" mode where it's more likely to end the game faster, but actually, after spending enough time in the game, my single play extended to a maximum of 25 minutes, so cutting the HP in half would be a good idea.
Originally I wanted it to be endless like Icy Tower, there's no dead end in that game until you make a mistake, but I had to make a quick decision for this jam. It will change of course, in a couple weeks. There will be a timed mode and endless, but I need to come up with an idea for a losing condition then.
We'll see, thanks for playing!