Thanks for the review! I was planning to make a much longer progress, and provided more than 1 solution for most monster puzzles to make the game funnier. So players still have a lot to do even after they get knocked out at the very beginning.
However, I miscalculated my working efficiency. So just like you said, since the first level makes 80% content for the jam version, it's much wiser to make it a linear game. I'll tweak this part on the next upload, prabably by May 6 to improve the experience!